Basic information

Full name
complement C3b/C4b receptor 1 (Knops blood group)
Ensembl
ENSG00000203710.11
Summary
This gene is a member of the receptors of complement activation (RCA) family and is located in the 'cluster RCA' region of chromosome 1. The genome is polymorphic at this locus with allele-specific splice variants encoding different isoforms, based on the presence/absence of long homologous repeats (LHRs). The gene encodes a monomeric single-pass type I membrane glycoprotein found on erythrocytes, leukocytes, glomerular podocytes, and splenic follicular dendritic cells. The Knops blood group system is a system of antigens located on this protein. The protein mediates cellular binding to particles and immune complexes that have activated complement. Decreases in expression of this protein and/or mutations in this gene have been associated with gallbladder carcinomas, mesangiocapillary glomerulonephritis, systemic lupus erythematosus, sarcoidosis and Alzheimer's disease. Mutations in this gene have also been associated with a reduction in Plasmodium falciparum rosetting, conferring protection against severe malaria. [provided by RefSeq, May 2020]
Annotation
Receptor

Protein product

Phosphosites on the primary protein product
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Tumor and normal comparison

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Signed p-values
Data type
Meta P
BRCA
CCRCC
COAD
GBM
HNSCC
LSCC
LUAD
OV
PDAC
UCEC
RNA-4e-11--1.0e-6--0.38-1e-10-1.4e-3--0.26-
protein-2.6e-19--7.5e-11-0.41--0.039-7.6e-7-3.3e-15-0.83-

* P-values are from Wilcoxon rank sum test and can be clicked to show the box plots. Positive values mean higher abundance in tumor. BRCA and GBM do not have normal samples.

mRNA expression at gene level
BRCACCRCCCOADGBMHNSCCLSCCLUADOVPDACUCEC12345678910111213log2(RSEM+1)tumornormal
Protein expression
BRCACCRCCCOADGBMHNSCCLSCCLUADOVPDACUCEC1516171819202122232425log2(MS1 intensity)tumornormal

* Mild outlier: filled circle; Extreme outlier: empty circle.

Phenotype and mutation association

Manhattan plot summarizing associations of phenotypes and mutations across all cohorts and omics data types

BRCACCRCCCOADGBMHNSCCLSCCLUADOVPDACUCEC0246810121416182022242628300-2-4-6-8-10-12-14-16-18-20-22-24-26-28-30Pan-cancer01020304050607080901001101201300-10-20-30-40-50-60-70-80-90-100-110-120-130proteinRNASCNVclinicalpathwaycell typegenomicmutation-log10 of P-value

* Data points of significant associations above and below the dotted lines can be hovered to show the phenotype.

Associations of the protein abundance of CR1 with phenotypes and mutations

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Signed p-values
Phenotype
Meta P
BRCA
CCRCC
COAD
GBM
HNSCC
LSCC
LUAD
OV
PDAC
UCEC
PROGENy: TNFa1.6e-240.190.364.9e-32.4e-74.2e-32.2e-168.4e-50.831.4e-50.011
PROGENy: NFkB4e-240.160.377.9e-31.5e-76.8e-32.2e-161.7e-40.857.6e-60.013
xcell: Monocyte3.6e-220.0310.811.6e-31.3e-83.6e-43e-130.245.9e-32.7e-40.35
cibersort: Neutrophil1.2e-218.2e-40.0430.0241.2e-31.7e-58.6e-105.4e-30.23.1e-30.056
HALLMARK_IL6_JAK_STAT3_SIGNALING2.1e-210.0550.150.0413.4e-70.222.2e-169.5e-40.141.6e-50.31
HALLMARK_INFLAMMATORY_RESPONSE2.9e-210.0360.110.0122.9e-70.132.2e-164.3e-30.512.8e-50.25
HALLMARK_COMPLEMENT6.4e-210.0380.0630.011.7e-70.352.2e-162.8e-30.391.1e-40.28
HALLMARK_TNFA_SIGNALING_VIA_NFKB7.9e-190.240.140.192.6e-70.0272.2e-164.5e-4-0.573.7e-40.048
ESTIMATE: ImmuneScore3.3e-170.0210.220.0572.1e-60.52.2e-160.010.0675.2e-4-0.8
xcell: Neutrophil1.3e-150.830.470.0435.6e-85.5e-62.8e-83.9e-30.938.7e-30.24
Showing 1 to 10 of 256 rows

* P-values could be from test for Spearman correlation, Wilcoxon rank sum test, Jonckheere-Terpstra trend test or Cox regression depending on the data type. P-values for individual cohorts can be clicked to show the data plots. The matrix icons in each row can be clicked to show a heatmap summary of associations across all cohorts and omics. The rows in the table can be expanded to show results from other omics.

Cis-association

Associations between omics data of CR1

BRCA0.60-0.15-0.29proteinmRNASCNVmethylationCCRCC0.360.050.11proteinmRNASCNVmethylationCOAD0.39-0.05-0.06proteinmRNASCNVmethylationGBM0.86-0.070.06proteinmRNASCNVmethylationHNSCC0.270.01-0.32proteinmRNASCNVmethylationLSCC0.68-0.14-0.23proteinmRNASCNVmethylationLUAD0.48-0.24-0.28proteinmRNASCNVmethylationOV0.390.53-0.14proteinmRNASCNVmethylationPDAC0.550.05-0.11proteinmRNASCNVmethylationUCEC0.31-0.01-0.13proteinmRNASCNVmethylation

* The numbers are Spearman correlation coefficients and can be clicked to show the scatter plots. The color and size of the circles correlate with the coefficients.

Trans-association

Associations of the protein abundance of CR1 and the protein abundance of other genes

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Signed p-values
Gene
Meta P
BRCA
CCRCC
COAD
GBM
HNSCC
LSCC
LUAD
OV
PDAC
UCEC
No matching records found

* P-values are from test for Spearman correlation. P-values for individual cohorts can be clicked to show the data plots. The matrix icons in each row can be clicked to show a heatmap summary of associations across all cohorts and omics. The rows in the table can be expanded to show results from other omics.

Gene set enrichment analysis

Submit genes and the common logarithm of the p-values of their association with to WebGestalt.