Details for: PRPSAP2

Gene ID: 5636

Gene Type:  Protein-coding  - A gene that serves as a template for producing a messenger RNA (mRNA) molecule, which is then translated into a functional protein.

Symbol: PRPSAP2

Ensembl ID: ENSG00000141127

Description: phosphoribosyl pyrophosphate synthetase associated protein 2

Selected Context(s):  Overall

Cell Significance Landscape

Contexts:

Associated with

Significant Cells

Cell Significance Index (CSI) scores for the chosen context(s)

  • germinal center B cell CL0000844
    CSI 10.27
    rCSI 30.62%
    PRS 67.73
  • enteroendocrine cell CL0000164
    CSI 5.86
    rCSI 8.01%
    PRS 47.76
  • regular atrial cardiac myocyte CL0002129
    CSI 5.26
    rCSI 16.93%
    PRS 44.45
  • mesenchymal cell CL0008019
    CSI 4.74
    rCSI 12.05%
    PRS 41.16
  • cerebral cortex endothelial cell CL1001602
    CSI 4.71
    rCSI 8.15%
    PRS 36.11
  • caudal ganglionic eminence derived cortical interneuron CL4023064
    CSI 4.53
    rCSI 8%
    PRS 28.77
  • progenitor cell CL0011026
    CSI 4.35
    rCSI 9.25%
    PRS 48.9
  • lung ciliated cell CL1000271
    CSI 3.62
    rCSI 4.18%
    PRS 35.57
  • CD4-positive, alpha-beta memory T cell CL0000897
    CSI 3.42
    rCSI 2.46%
    PRS 58.12
  • pancreatic D cell CL0000173
    CSI 3.4
    rCSI 3.34%
    PRS 47.52
  • double negative thymocyte CL0002489
    CSI 3.38
    rCSI 2.35%
    PRS 53.79
  • unswitched memory B cell CL0000970
    CSI 3.36
    rCSI 2.82%
    PRS 62.52
  • astrocyte of the cerebral cortex CL0002605
    CSI 3.33
    rCSI 7.46%
    PRS 30.47
  • pancreatic A cell CL0000171
    CSI 3.25
    rCSI 3.41%
    PRS 47.93
  • cardiac endothelial cell CL0010008
    CSI 3.19
    rCSI 12.85%
    PRS 43.64
  • Bergmann glial cell CL0000644
    CSI 3.03
    rCSI 4.14%
    PRS 41.4
  • T follicular helper cell CL0002038
    CSI 2.95
    rCSI 2.21%
    PRS 59.69
  • mesodermal cell CL0000222
    CSI 2.78
    rCSI 3.34%
    PRS 43.3
  • choroid plexus epithelial cell CL0000706
    CSI 2.6
    rCSI 4.26%
    PRS 36.08
  • renal alpha-intercalated cell CL0005011
    CSI 2.57
    rCSI 3.43%
    PRS 53.55
  • effector CD8-positive, alpha-beta T cell CL0001050
    CSI 2.53
    rCSI 1.92%
    PRS 56.46
  • cerebellar granule cell CL0001031
    CSI 2.52
    rCSI 3.7%
    PRS 41.05
  • myeloid leukocyte CL0000766
    CSI 2.52
    rCSI 2.32%
    PRS 46.04
  • kidney loop of Henle thin descending limb epithelial cell CL1001111
    CSI 2.49
    rCSI 3.53%
    PRS 42.17
  • CD4-positive, CD25-positive, alpha-beta regulatory T cell CL0000792
    CSI 2.42
    rCSI 2.38%
    PRS 60.51
  • plasmablast CL0000980
    CSI 2.42
    rCSI 1.9%
    PRS 51.56
  • central memory CD4-positive, alpha-beta T cell CL0000904
    CSI 2.39
    rCSI 1.41%
    PRS 60.37
  • naive T cell CL0000898
    CSI 2.37
    rCSI 1.65%
    PRS 58.02
  • early lymphoid progenitor CL0000936
    CSI 2.3
    rCSI 2.02%
    PRS 50.08
  • ON-bipolar cell CL0000749
    CSI 2.27
    rCSI 3.37%
    PRS 47.62
  • epithelial cell of lung CL0000082
    CSI 2.26
    rCSI 1.87%
    PRS 43.68
  • interstitial cell of Cajal CL0002088
    CSI 2.25
    rCSI 2.87%
    PRS 50.52
  • melanocyte CL0000148
    CSI 2.21
    rCSI 1.63%
    PRS 38.76
  • kidney connecting tubule epithelial cell CL1000768
    CSI 2.17
    rCSI 5.5%
    PRS 35.91
  • intestine goblet cell CL0019031
    CSI 2.13
    rCSI 1.89%
    PRS 44.09
  • cerebral cortex GABAergic interneuron CL0010011
    CSI 2.13
    rCSI 6.28%
    PRS 49.07
  • Kupffer cell CL0000091
    CSI 2.12
    rCSI 4.85%
    PRS 44.56
  • central nervous system neuron CL2000029
    CSI 2.11
    rCSI 15.53%
    PRS 33.4
  • OFF-bipolar cell CL0000750
    CSI 2.08
    rCSI 2.84%
    PRS 54.77
  • immature B cell CL0000816
    CSI 2.07
    rCSI 1.54%
    PRS 58.39
  • kidney interstitial alternatively activated macrophage CL1000695
    CSI 2.04
    rCSI 5.33%
    PRS 44.24
  • parietal epithelial cell CL1000452
    CSI 2.04
    rCSI 5.45%
    PRS 38.22
  • hematopoietic stem cell CL0000037
    CSI 2.03
    rCSI 1.35%
    PRS 48.92
  • central memory CD8-positive, alpha-beta T cell CL0000907
    CSI 2.02
    rCSI 1.36%
    PRS 55.56
  • plasmacytoid dendritic cell, human CL0001058
    CSI 2.01
    rCSI 1.4%
    PRS 46.91
  • double-positive, alpha-beta thymocyte CL0000809
    CSI 2
    rCSI 2.04%
    PRS 58.3
  • group 3 innate lymphoid cell CL0001071
    CSI 1.97
    rCSI 1.48%
    PRS 48.63
  • epithelial cell of lower respiratory tract CL0002632
    CSI 1.95
    rCSI 1.51%
    PRS 45.63
  • ionocyte CL0005006
    CSI 1.94
    rCSI 2.08%
    PRS 43.13
  • Mueller cell CL0000636
    CSI 1.93
    rCSI 4.4%
    PRS 38.68
  • common lymphoid progenitor CL0000051
    CSI 1.88
    rCSI 2.51%
    PRS 67.57
  • tendon cell CL0000388
    CSI 1.85
    rCSI 4.81%
    PRS 68.03
  • pro-B cell CL0000826
    CSI 1.84
    rCSI 1.52%
    PRS 46.08
  • intestinal epithelial cell CL0002563
    CSI 1.84
    rCSI 1.92%
    PRS 44.65
  • interneuron CL0000099
    CSI 1.82
    rCSI 3.66%
    PRS 35.21
  • neural crest cell CL0011012
    CSI 1.81
    rCSI 1.43%
    PRS 33.16
  • colon epithelial cell CL0011108
    CSI 1.8
    rCSI 1.89%
    PRS 42.3
  • vascular leptomeningeal cell CL4023051
    CSI 1.77
    rCSI 3.1%
    PRS 37.69
  • extravillous trophoblast CL0008036
    CSI 1.76
    rCSI 2.18%
    PRS 41.1
  • multi-ciliated epithelial cell CL0005012
    CSI 1.73
    rCSI 1.73%
    PRS 39.5
  • common myeloid progenitor CL0000049
    CSI 1.68
    rCSI 1.36%
    PRS 45.75
  • ciliated epithelial cell CL0000067
    CSI 1.68
    rCSI 1.47%
    PRS 34.56
  • neuroblast (sensu Vertebrata) CL0000031
    CSI 1.65
    rCSI 2.12%
    PRS 43.13
  • stem cell CL0000034
    CSI 1.64
    rCSI 1.58%
    PRS 36.02
  • chondrocyte CL0000138
    CSI 1.63
    rCSI 2.6%
    PRS 38.34
  • type B pancreatic cell CL0000169
    CSI 1.61
    rCSI 3.55%
    PRS 42.52
  • mononuclear phagocyte CL0000113
    CSI 1.6
    rCSI 3.53%
    PRS 49.04
  • retinal bipolar neuron CL0000748
    CSI 1.58
    rCSI 2.95%
    PRS 35.14
  • epithelial cell of proximal tubule CL0002306
    CSI 1.54
    rCSI 3.76%
    PRS 41.2
  • VIP GABAergic cortical interneuron CL4023016
    CSI 1.52
    rCSI 1.81%
    PRS 29.67
  • radial glial cell CL0000681
    CSI 1.5
    rCSI 2.09%
    PRS 44.55
  • effector CD4-positive, alpha-beta T cell CL0001044
    CSI 1.44
    rCSI 4.14%
    PRS 62.94
  • enteric smooth muscle cell CL0002504
    CSI 1.43
    rCSI 2.04%
    PRS 47.81
  • lamp5 GABAergic cortical interneuron CL4023011
    CSI 1.41
    rCSI 2.37%
    PRS 29.75
  • retinal pigment epithelial cell CL0002586
    CSI 1.41
    rCSI 2.8%
    PRS 44.29
  • neuroblast (sensu Nematoda and Protostomia) CL0000338
    CSI 1.41
    rCSI 1.62%
    PRS 39.57
  • lung secretory cell CL1000272
    CSI 1.4
    rCSI 3.46%
    PRS 43.2
  • rod bipolar cell CL0000751
    CSI 1.4
    rCSI 2.51%
    PRS 38.72
  • erythrocyte CL0000232
    CSI 1.37
    rCSI 3.1%
    PRS 50.47
  • transit amplifying cell of colon CL0009011
    CSI 1.37
    rCSI 1.6%
    PRS 48.78
  • sst GABAergic cortical interneuron CL4023017
    CSI 1.36
    rCSI 1.75%
    PRS 30.64
  • retinal rod cell CL0000604
    CSI 1.35
    rCSI 2.38%
    PRS 43.48
  • ependymal cell CL0000065
    CSI 1.34
    rCSI 2.72%
    PRS 28.07
  • glioblast CL0000030
    CSI 1.32
    rCSI 2.11%
    PRS 39.13
  • retina horizontal cell CL0000745
    CSI 1.3
    rCSI 1.98%
    PRS 41.9
  • inhibitory interneuron CL0000498
    CSI 1.27
    rCSI 2.94%
    PRS 37
  • hepatic stellate cell CL0000632
    CSI 1.25
    rCSI 4.7%
    PRS 38.35
  • retinal cone cell CL0000573
    CSI 1.23
    rCSI 1.98%
    PRS 36.04
  • kidney loop of Henle thin ascending limb epithelial cell CL1001107
    CSI 1.2
    rCSI 3.09%
    PRS 41.39
  • pvalb GABAergic cortical interneuron CL4023018
    CSI 1.19
    rCSI 1.48%
    PRS 28.23
  • peripheral nervous system neuron CL2000032
    CSI 1.17
    rCSI 1.6%
    PRS 38.59
  • renal interstitial pericyte CL1001318
    CSI 1.15
    rCSI 3.18%
    PRS 41.91
  • retinal blood vessel endothelial cell CL0002585
    CSI 1.15
    rCSI 1.84%
    PRS 48.99
  • corticothalamic-projecting glutamatergic cortical neuron CL4023013
    CSI 1.11
    rCSI 6.51%
    PRS 31.12
  • melanocyte of skin CL1000458
    CSI 1.1
    rCSI 1.5%
    PRS 23.17
  • GABAergic neuron CL0000617
    CSI 1.08
    rCSI 3.63%
    PRS 33.68
  • sncg GABAergic cortical interneuron CL4023015
    CSI 1.06
    rCSI 1.71%
    PRS 31.8
  • cardiac neuron CL0010022
    CSI 1.06
    rCSI 3.38%
    PRS 42.14
  • cardiac muscle cell CL0000746
    CSI 1.05
    rCSI 1.5%
    PRS 36.67
  • common dendritic progenitor CL0001029
    CSI 1.03
    rCSI 1.3%
    PRS 54.87
  • medium spiny neuron CL1001474
    CSI 0.1
    rCSI 1.2%
    PRS 33.0%
  • direct pathway medium spiny neuron CL4023026
    CSI 0.2
    rCSI 4.6%
    PRS 29.2%
  • indirect pathway medium spiny neuron CL4023029
    CSI 0.2
    rCSI 5.1%
    PRS 30.1%
  • chandelier pvalb GABAergic cortical interneuron CL4023036
    CSI 0.4
    rCSI 1.2%
    PRS 33.2%
  • effector memory CD8-positive, alpha-beta T cell, terminally differentiated CL0001062
    CSI 0.4
    rCSI 1.9%
    PRS 56.1%
  • amacrine cell CL0000561
    CSI 0.4
    rCSI 1.2%
    PRS 36.7%
  • erythroblast CL0000765
    CSI 0.4
    rCSI 1.1%
    PRS 58.4%
  • near-projecting glutamatergic cortical neuron CL4023012
    CSI 0.5
    rCSI 1.9%
    PRS 30.6%
  • primitive red blood cell CL0002355
    CSI 0.5
    rCSI 2.7%
    PRS 59.7%
  • forebrain radial glial cell CL0013000
    CSI 0.5
    rCSI 1.6%
    PRS 52.6%
  • L6b glutamatergic cortical neuron CL4023038
    CSI 0.6
    rCSI 1.8%
    PRS 30.9%
  • regular ventricular cardiac myocyte CL0002131
    CSI 0.6
    rCSI 3.5%
    PRS 37.8%
  • erythroid progenitor cell CL0000038
    CSI 0.6
    rCSI 3.6%
    PRS 55.9%
  • L5 extratelencephalic projecting glutamatergic cortical neuron CL4023041
    CSI 0.6
    rCSI 2.3%
    PRS 28.6%
  • podocyte CL0000653
    CSI 0.7
    rCSI 2.9%
    PRS 43.9%
  • megakaryocyte-erythroid progenitor cell CL0000050
    CSI 0.7
    rCSI 0.6%
    PRS 41.8%
  • L2/3-6 intratelencephalic projecting glutamatergic neuron CL4023040
    CSI 0.7
    rCSI 1.7%
    PRS 28.9%
  • glial cell CL0000125
    CSI 0.9
    rCSI 3.3%
    PRS 38.5%
  • S cone cell CL0003050
    CSI 0.9
    rCSI 3.9%
    PRS 42.8%
  • CD14-low, CD16-positive monocyte CL0002396
    CSI 0.9
    rCSI 0.7%
    PRS 44.0%
  • lung neuroendocrine cell CL1000223
    CSI 1.0
    rCSI 1.4%
    PRS 50.2%
  • retinal ganglion cell CL0000740
    CSI 1.0
    rCSI 2.2%
    PRS 33.7%
  • glycinergic amacrine cell CL4030028
    CSI 1.0
    rCSI 2.7%
    PRS 44.7%
  • common dendritic progenitor CL0001029
    CSI 1.0
    rCSI 1.3%
    PRS 54.9%
  • cardiac muscle cell CL0000746
    CSI 1.1
    rCSI 1.5%
    PRS 36.7%
  • cardiac neuron CL0010022
    CSI 1.1
    rCSI 3.4%
    PRS 42.1%
  • sncg GABAergic cortical interneuron CL4023015
    CSI 1.1
    rCSI 1.7%
    PRS 31.8%
  • GABAergic neuron CL0000617
    CSI 1.1
    rCSI 3.6%
    PRS 33.7%
  • melanocyte of skin CL1000458
    CSI 1.1
    rCSI 1.5%
    PRS 23.2%
  • corticothalamic-projecting glutamatergic cortical neuron CL4023013
    CSI 1.1
    rCSI 6.5%
    PRS 31.1%
  • retinal blood vessel endothelial cell CL0002585
    CSI 1.2
    rCSI 1.8%
    PRS 49.0%
  • renal interstitial pericyte CL1001318
    CSI 1.2
    rCSI 3.2%
    PRS 41.9%
  • peripheral nervous system neuron CL2000032
    CSI 1.2
    rCSI 1.6%
    PRS 38.6%
  • pvalb GABAergic cortical interneuron CL4023018
    CSI 1.2
    rCSI 1.5%
    PRS 28.2%
  • kidney loop of Henle thin ascending limb epithelial cell CL1001107
    CSI 1.2
    rCSI 3.1%
    PRS 41.4%
  • retinal cone cell CL0000573
    CSI 1.2
    rCSI 2.0%
    PRS 36.0%
  • hepatic stellate cell CL0000632
    CSI 1.3
    rCSI 4.7%
    PRS 38.4%
  • inhibitory interneuron CL0000498
    CSI 1.3
    rCSI 2.9%
    PRS 37.0%
  • retina horizontal cell CL0000745
    CSI 1.3
    rCSI 2.0%
    PRS 41.9%
  • glioblast CL0000030
    CSI 1.3
    rCSI 2.1%
    PRS 39.1%
  • ependymal cell CL0000065
    CSI 1.3
    rCSI 2.7%
    PRS 28.1%
  • retinal rod cell CL0000604
    CSI 1.4
    rCSI 2.4%
    PRS 43.5%
  • sst GABAergic cortical interneuron CL4023017
    CSI 1.4
    rCSI 1.8%
    PRS 30.6%
  • transit amplifying cell of colon CL0009011
    CSI 1.4
    rCSI 1.6%
    PRS 48.8%
  • erythrocyte CL0000232
    CSI 1.4
    rCSI 3.1%
    PRS 50.5%
  • rod bipolar cell CL0000751
    CSI 1.4
    rCSI 2.5%
    PRS 38.7%
  • lung secretory cell CL1000272
    CSI 1.4
    rCSI 3.5%
    PRS 43.2%
  • neuroblast (sensu Nematoda and Protostomia) CL0000338
    CSI 1.4
    rCSI 1.6%
    PRS 39.6%
  • retinal pigment epithelial cell CL0002586
    CSI 1.4
    rCSI 2.8%
    PRS 44.3%
  • lamp5 GABAergic cortical interneuron CL4023011
    CSI 1.4
    rCSI 2.4%
    PRS 29.8%
  • enteric smooth muscle cell CL0002504
    CSI 1.4
    rCSI 2.0%
    PRS 47.8%
  • effector CD4-positive, alpha-beta T cell CL0001044
    CSI 1.4
    rCSI 4.1%
    PRS 62.9%
  • radial glial cell CL0000681
    CSI 1.5
    rCSI 2.1%
    PRS 44.6%
  • VIP GABAergic cortical interneuron CL4023016
    CSI 1.5
    rCSI 1.8%
    PRS 29.7%
  • epithelial cell of proximal tubule CL0002306
    CSI 1.5
    rCSI 3.8%
    PRS 41.2%
  • retinal bipolar neuron CL0000748
    CSI 1.6
    rCSI 3.0%
    PRS 35.1%
  • mononuclear phagocyte CL0000113
    CSI 1.6
    rCSI 3.5%
    PRS 49.0%
  • type B pancreatic cell CL0000169
    CSI 1.6
    rCSI 3.6%
    PRS 42.5%
  • chondrocyte CL0000138
    CSI 1.6
    rCSI 2.6%
    PRS 38.3%
  • stem cell CL0000034
    CSI 1.6
    rCSI 1.6%
    PRS 36.0%
  • neuroblast (sensu Vertebrata) CL0000031
    CSI 1.7
    rCSI 2.1%
    PRS 43.1%
  • ciliated epithelial cell CL0000067
    CSI 1.7
    rCSI 1.5%
    PRS 34.6%
  • common myeloid progenitor CL0000049
    CSI 1.7
    rCSI 1.4%
    PRS 45.8%
  • multi-ciliated epithelial cell CL0005012
    CSI 1.7
    rCSI 1.7%
    PRS 39.5%
  • extravillous trophoblast CL0008036
    CSI 1.8
    rCSI 2.2%
    PRS 41.1%
  • vascular leptomeningeal cell CL4023051
    CSI 1.8
    rCSI 3.1%
    PRS 37.7%
  • colon epithelial cell CL0011108
    CSI 1.8
    rCSI 1.9%
    PRS 42.3%
  • neural crest cell CL0011012
    CSI 1.8
    rCSI 1.4%
    PRS 33.2%
  • interneuron CL0000099
    CSI 1.8
    rCSI 3.7%
    PRS 35.2%
  • intestinal epithelial cell CL0002563
    CSI 1.8
    rCSI 1.9%
    PRS 44.7%
  • pro-B cell CL0000826
    CSI 1.8
    rCSI 1.5%
    PRS 46.1%
  • tendon cell CL0000388
    CSI 1.9
    rCSI 4.8%
    PRS 68.0%
  • common lymphoid progenitor CL0000051
    CSI 1.9
    rCSI 2.5%
    PRS 67.6%
  • Mueller cell CL0000636
    CSI 1.9
    rCSI 4.4%
    PRS 38.7%
  • ionocyte CL0005006
    CSI 1.9
    rCSI 2.1%
    PRS 43.1%
  • epithelial cell of lower respiratory tract CL0002632
    CSI 2.0
    rCSI 1.5%
    PRS 45.6%
  • group 3 innate lymphoid cell CL0001071
    CSI 2.0
    rCSI 1.5%
    PRS 48.6%
  • double-positive, alpha-beta thymocyte CL0000809
    CSI 2.0
    rCSI 2.0%
    PRS 58.3%
  • plasmacytoid dendritic cell, human CL0001058
    CSI 2.0
    rCSI 1.4%
    PRS 46.9%
  • central memory CD8-positive, alpha-beta T cell CL0000907
    CSI 2.0
    rCSI 1.4%
    PRS 55.6%
  • hematopoietic stem cell CL0000037
    CSI 2.0
    rCSI 1.4%
    PRS 48.9%
  • parietal epithelial cell CL1000452
    CSI 2.0
    rCSI 5.5%
    PRS 38.2%
  • kidney interstitial alternatively activated macrophage CL1000695
    CSI 2.0
    rCSI 5.3%
    PRS 44.2%
  • immature B cell CL0000816
    CSI 2.1
    rCSI 1.5%
    PRS 58.4%
  • OFF-bipolar cell CL0000750
    CSI 2.1
    rCSI 2.8%
    PRS 54.8%
  • central nervous system neuron CL2000029
    CSI 2.1
    rCSI 15.5%
    PRS 33.4%
  • Kupffer cell CL0000091
    CSI 2.1
    rCSI 4.9%
    PRS 44.6%
  • cerebral cortex GABAergic interneuron CL0010011
    CSI 2.1
    rCSI 6.3%
    PRS 49.1%
  • intestine goblet cell CL0019031
    CSI 2.1
    rCSI 1.9%
    PRS 44.1%
  • kidney connecting tubule epithelial cell CL1000768
    CSI 2.2
    rCSI 5.5%
    PRS 35.9%
  • melanocyte CL0000148
    CSI 2.2
    rCSI 1.6%
    PRS 38.8%
  • interstitial cell of Cajal CL0002088
    CSI 2.3
    rCSI 2.9%
    PRS 50.5%
  • epithelial cell of lung CL0000082
    CSI 2.3
    rCSI 1.9%
    PRS 43.7%
  • ON-bipolar cell CL0000749
    CSI 2.3
    rCSI 3.4%
    PRS 47.6%
  • early lymphoid progenitor CL0000936
    CSI 2.3
    rCSI 2.0%
    PRS 50.1%
  • naive T cell CL0000898
    CSI 2.4
    rCSI 1.7%
    PRS 58.0%
  • central memory CD4-positive, alpha-beta T cell CL0000904
    CSI 2.4
    rCSI 1.4%
    PRS 60.4%
  • plasmablast CL0000980
    CSI 2.4
    rCSI 1.9%
    PRS 51.6%
  • CD4-positive, CD25-positive, alpha-beta regulatory T cell CL0000792
    CSI 2.4
    rCSI 2.4%
    PRS 60.5%
  • kidney loop of Henle thin descending limb epithelial cell CL1001111
    CSI 2.5
    rCSI 3.5%
    PRS 42.2%

Cell ID: Standard Cell Ontology term used for mapping and comparing cells across experiments. Ensures consistency in analyzing cellular functions across tissues.
Fold Change: Represents the ratio of the current Cell Significance Index to the Cell Significance Index Threshold, indicating how much the gene expression has changed compared to a baseline.
Cell Significance Index: Reflects how strongly a gene is expressed in this specific cell.

Cell ID: Standard Cell Ontology term used for mapping and comparing cells across experiments. Ensures consistency in analyzing cellular functions across tissues.
Fold Change: Represents the ratio of the current Cell Significance Index to the Cell Significance Index Threshold, indicating how much the gene expression has changed compared to a baseline.
Cell Significance Index: Reflects how strongly a gene is expressed in this cell type. Calculated using techniques like effect size estimation and bootstrapping for reliability.

Cell ID: Standard Cell Ontology term used for mapping and comparing cells across experiments. Ensures consistency in analyzing cellular functions across tissues.
Fold Change: Represents the ratio of the current Cell Significance Index to the Cell Significance Index Threshold, indicating how much the gene expression has changed compared to a baseline.
Cell Significance Index: Reflects how strongly a gene is expressed in this cell type. Calculated using techniques like effect size estimation and bootstrapping for reliability.
Network Configuration

Explore relationships of the current gene. Select an Interaction Source: 'ONTOLOGY' for shared pathways (GO/Reactome) or 'STRING' for protein-protein interactions. Further refine by selecting context genes and comparing Cell Significance Index (CSI) scores between baseline and target cell types and their specific contexts.

Comma-separated if multiple.
Comma-separated if multiple.

Legend:
  • Query Gene
  • Node Color (Target Cell CSI, relative to current network):
    • Very High
    • High
    • Medium
    • Low
    • Very Low
    • CSI N/A
  • Node Size: Proportional to Target Cell CSI magnitude
  • STRING PPI Edge
  • Shared Pathway Edge (ONTOLOGY)

Loading network (please wait)...

Other Information

This section provides additional information about the gene, including a description generated by an AI language model and details about associated proteins.

## Summary [PRPSAP2](/details-gene/5636) (phosphoribosyl pyrophosphate synthetase associated protein 2) is a protein-coding gene located on chromosome 17p11.2. It functions as an enzyme regulator, specifically inhibiting the activity of phosphoribosyl pyrophosphate synthetase (PRPS), a key enzyme in the '5-phosphoribose 1-diphosphate biosynthetic process' ([GO:0006015](https://www.ebi.ac.uk/QuickGO/term/GO:0006015)). This process is fundamental for the de novo and salvage pathways of purine and pyrimidine nucleotide synthesis. Expression data indicates that **Overall**, [PRPSAP2](/details-gene/5636) is a highly significant gene in diverse and metabolically active cell types, with its most notable significance observed in [germinal center B cell](/details-cell/CL0000844)s, suggesting a critical role in regulating nucleotide pools required for cellular proliferation, differentiation, and energy homeostasis. ## Cellular Roles and Expression Landscape The expression profile of [PRPSAP2](/details-gene/5636) highlights its importance in cells with high metabolic or proliferative demands. **Overall**, its most significant expression is in [germinal center B cell](/details-cell/CL0000844) (CSI: 10.27), a cell type characterized by rapid division and antibody production, which requires substantial nucleotide synthesis. This suggests [PRPSAP2](/details-gene/5636) is a key metabolic checkpoint in the adaptive immune response. Beyond the immune system, [PRPSAP2](/details-gene/5636) shows significant expression across a wide range of functionally distinct cell lineages. These include: * **Endocrine and Secretory Cells:** High significance in [enteroendocrine cell](/details-cell/CL0000164) (CSI: 5.86), [pancreatic D cell](/details-cell/CL0000173) (CSI: 3.40), and [pancreatic A cell](/details-cell/CL0000171) (CSI: 3.25), which are involved in hormone production and secretion. * **Cardiac and Endothelial Tissues:** Notable expression in [regular atrial cardiac myocyte](/details-cell/CL0002129) (CSI: 5.26), [cerebral cortex endothelial cell](/details-cell/CL1001602) (CSI: 4.71), and [cardiac endothelial cell](/details-cell/CL0010008) (CSI: 3.19), suggesting a role in maintaining energy balance in tissues with high ATP turnover. * **Neural and Progenitor Cells:** Significant presence in cell types like [caudal ganglionic eminence derived cortical interneuron](/details-cell/CL4023064) (CSI: 4.53) and [progenitor cell](/details-cell/CL0011026) (CSI: 4.35). * **Other Immune Cells:** Its role in immunity is further supported by its expression in [CD4-positive, alpha-beta memory T cell](/details-cell/CL0000897) (CSI: 3.42) and developing [double negative thymocyte](/details-cell/CL0002489)s (CSI: 3.38). This broad but specific expression pattern indicates that [PRPSAP2](/details-gene/5636) is not a simple housekeeping gene but rather a critical regulator deployed in diverse cell types that share a common requirement for tightly controlled nucleotide metabolism. ## Pathways and Molecular Function Functionally, [PRPSAP2](/details-gene/5636) is annotated as an 'enzyme inhibitor' ([GO:0004857](https://www.ebi.ac.uk/QuickGO/term/GO:0004857)) that negatively regulates PRPS, the enzyme responsible for synthesizing 5-phosphoribosyl-1-pyrophosphate (PRPP). PRPP is a central metabolite for the 'purine nucleotide biosynthetic process' ([GO:0006164](https://www.ebi.ac.uk/QuickGO/term/GO:0006164)) and the broader 'nucleobase-containing compound metabolic process' ([GO:0006139](https://www.ebi.ac.uk/QuickGO/term/GO:0006139)). The gene has also been associated with 'bone development' ([GO:0060348](https://www.ebi.ac.uk/QuickGO/term/GO:0060348)), though this role is less characterized. The protein itself is known to engage in 'identical protein binding' ([GO:0042802](https://www.ebi.ac.uk/QuickGO/term/GO:0042802)) and 'magnesium ion binding' ([GO:0000287](https://www.ebi.ac.uk/QuickGO/term/GO:0000287)), and is localized to the 'cytoplasm' ([GO:0005737](https://www.ebi.ac.uk/QuickGO/term/GO:0005737)). Its initial cloning and characterization were described in early genomic studies ([Link](https://doi.org/10.1016/s0167-4781(97)00217-0), [Link](https://doi.org/10.1038/ng1285)). The protein's phosphorylation status has been documented in several large-scale phosphoproteomic screens, indicating it is subject to regulation by cellular signaling networks ([Link](https://doi.org/10.1016/j.cell.2006.09.026), [Link](https://doi.org/10.1073/pnas.0805139105)). ## Research Directions The widespread expression of [PRPSAP2](/details-gene/5636) in metabolically active cells, combined with its specific regulatory function, presents several avenues for future research. ### Proposed Hypotheses 1. **Role in Humoral Immunity:** Given its top expression significance in [germinal center B cell](/details-cell/CL0000844)s, [PRPSAP2](/details-gene/5636) may act as a critical checkpoint to modulate nucleotide availability during B cell clonal expansion and affinity maturation. Its downregulation could be essential to permit the high metabolic flux required, while its dysregulation could contribute to B-cell lymphomas or immunodeficiencies. 2. **Function in Tissue Homeostasis:** The high significance of [PRPSAP2](/details-gene/5636) in terminally differentiated, high-energy-demand cells like [regular atrial cardiac myocyte](/details-cell/CL0002129)s suggests it plays a vital role in maintaining ATP/GTP pools for cellular function (e.g., muscle contraction, ion transport) rather than for proliferation. In this context, it may protect cells from metabolic stress by fine-tuning nucleotide salvage and synthesis pathways. ### Key Experimental Approach To test the first hypothesis regarding its role in humoral immunity, a conditional knockout mouse model could be developed using the Cre-Lox system (e.g., *Cd19-Cre;Prpsap2-flox/flox*) to achieve B-cell specific deletion of [PRPSAP2](/details-gene/5636). Following immunization with a T-cell dependent antigen, key parameters of the germinal center reaction could be evaluated. A significant impairment in the formation of germinal centers, altered somatic hypermutation rates, or reduced production of high-affinity antibodies in knockout mice compared to wild-type controls would provide strong evidence for its essential role in the B cell response. ### Therapeutic Potential As a negative regulator of a key node in nucleotide metabolism, [PRPSAP2](/details-gene/5636) represents an intriguing, albeit complex, therapeutic target. The pathways it governs are established targets for anticancer and immunosuppressive therapies. Therefore, targeting the PRPS/[PRPSAP2](/details-gene/5636) axis could be a viable strategy. Specifically, developing small molecule inhibitors that mimic or stabilize the inhibitory function of [PRPSAP2](/details-gene/5636) could be effective in treating diseases of hyperproliferation, such as B-cell malignancies. However, given its importance in other vital tissues like the heart and brain, a major challenge would be achieving cell-type specificity to avoid significant off-target toxicity.

Genular Protein ID: 2045524281

Symbol: KPRB_HUMAN

Name: Phosphoribosyl pyrophosphate synthase-associated protein 2

UniProtKB Accession Codes:

Database IDs:

Citations:

PubMed ID: 9545573

Title: Molecular cloning of a human cDNA for the 41-kDa phosphoribosylpyrophosphate synthetase-associated protein.

PubMed ID: 9545573

DOI: 10.1016/s0167-4781(97)00217-0

PubMed ID: 14702039

Title: Complete sequencing and characterization of 21,243 full-length human cDNAs.

PubMed ID: 14702039

DOI: 10.1038/ng1285

PubMed ID: 16625196

Title: DNA sequence of human chromosome 17 and analysis of rearrangement in the human lineage.

PubMed ID: 16625196

DOI: 10.1038/nature04689

PubMed ID: 15489334

Title: The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).

PubMed ID: 15489334

DOI: 10.1101/gr.2596504

PubMed ID: 17081983

Title: Global, in vivo, and site-specific phosphorylation dynamics in signaling networks.

PubMed ID: 17081983

DOI: 10.1016/j.cell.2006.09.026

PubMed ID: 18669648

Title: A quantitative atlas of mitotic phosphorylation.

PubMed ID: 18669648

DOI: 10.1073/pnas.0805139105

PubMed ID: 19413330

Title: Lys-N and trypsin cover complementary parts of the phosphoproteome in a refined SCX-based approach.

PubMed ID: 19413330

DOI: 10.1021/ac9004309

PubMed ID: 19690332

Title: Quantitative phosphoproteomic analysis of T cell receptor signaling reveals system-wide modulation of protein-protein interactions.

PubMed ID: 19690332

DOI: 10.1126/scisignal.2000007

PubMed ID: 20068231

Title: Quantitative phosphoproteomics reveals widespread full phosphorylation site occupancy during mitosis.

PubMed ID: 20068231

DOI: 10.1126/scisignal.2000475

PubMed ID: 21269460

Title: Initial characterization of the human central proteome.

PubMed ID: 21269460

DOI: 10.1186/1752-0509-5-17

PubMed ID: 21406692

Title: System-wide temporal characterization of the proteome and phosphoproteome of human embryonic stem cell differentiation.

PubMed ID: 21406692

DOI: 10.1126/scisignal.2001570

PubMed ID: 23186163

Title: Toward a comprehensive characterization of a human cancer cell phosphoproteome.

PubMed ID: 23186163

DOI: 10.1021/pr300630k

PubMed ID: 24275569

Title: An enzyme assisted RP-RPLC approach for in-depth analysis of human liver phosphoproteome.

PubMed ID: 24275569

DOI: 10.1016/j.jprot.2013.11.014

Sequence Information:

  • Length: 369
  • Mass: 40926
  • Checksum: 12A0E46BD4AC55BF
  • Sequence:
  • MFCVTPPELE TKMNITKGGL VLFSANSNSS CMELSKKIAE RLGVEMGKVQ VYQEPNRETR 
    VQIQESVRGK DVFIIQTVSK DVNTTIMELL IMVYACKTSC AKSIIGVIPY FPYSKQCKMR 
    KRGSIVSKLL ASMMCKAGLT HLITMDLHQK EIQGFFNIPV DNLRASPFLL QYIQEEIPDY 
    RNAVIVAKSP ASAKRAQSFA ERLRLGIAVI HGEAQDAESD LVDGRHSPPM VRSVAAIHPS 
    LEIPMLIPKE KPPITVVGDV GGRIAIIVDD IIDDVDSFLA AAETLKERGA YKIFVMATHG 
    LLSSDAPRRI EESAIDEVVV TNTIPHEVQK LQCPKIKTVD ISMILSEAIR RIHNGESMSY 
    LFRNIGLDD