Version: 8.0.0Date: Tue Jan 28 2025
Gene
C4B_2
- Species
- Homo sapiens
- Symbol
- C4B_2
- Name
- complement component 4B (Chido/Rodgers blood group), copy 2
- Synonyms
- complement C4-B-like
- complement component 4B (Chido blood group), copy 2
- Biotype
- protein coding gene
- Automated Description
- Enables carbohydrate binding activity and complement binding activity. Involved in complement activation and positive regulation of apoptotic cell clearance. Located in extracellular space and symbiont cell surface.
- RGD Description
- This gene encodes the basic form of complement factor 4, part of the classical activation pathway. The protein is expressed as a single chain precursor which is proteolytically cleaved into a trimer of alpha, beta, and gamma chains prior to secretion. The trimer provides a surface for interaction between the antigen-antibody complex and other complement components. The alpha chain may be cleaved to release C4 anaphylatoxin, a mediator of local inflammation. Deficiency of this protein is associated with systemic lupus erythematosus. This gene localizes to the major histocompatibility complex (MHC) class III region on chromosome 6. Varying haplotypes of this gene cluster exist, such that individuals may have 1, 2, or 3 copies of this gene. In addition, this gene exists as a long form and a short form due to the presence or absence of a 6.4 kb endogenous HERV-K retrovirus in intron 9. This GeneID and its associated RefSeq record represent a second copy of C4B found on ALT_REF_LOCI_7. [provided by RefSeq, Jul 2011]
- Cross References
- Additional Information
- Literature
Phenotypes
- Primary Sources
- None
- Other Sources
Phenotype Term | Annotation details | References |
|---|---|---|
| No records match query. Try removing filters. | ||
Showing 0 - 0 of 0 rows
per page
Disease Associations
Cases where the expected disease association was NOT found
Cell color indicative of annotation volume
No data available
Alleles and Variants
Allele/Variant Symbol | Allele Synonyms | Category | Variant | Variant type | Molecular consequence | Has Disease Annotations | Has Phenotype Annotations |
|---|---|---|---|---|---|---|---|
| No records match query. Try removing filters. | |||||||
Showing 0 - 0 of 0 rows
per page
Transgenic Alleles
Species (carrying the transgene) | Allele symbol | Transgenic construct | Expressed components | Knock-down targets | Regulatory regions | Has Disease Annotations | Has Phenotype Annotations |
|---|---|---|---|---|---|---|---|
| No records match query. Try removing filters. | |||||||
Showing 0 - 0 of 0 rows
per page
Models
Model name | Experimental condition | Associated Human Diseases | Associated Phenotypes | Modifier | Source |
|---|---|---|---|---|---|
| No records match query. Try removing filters. | |||||
Showing 0 - 0 of 0 rows
per page
Expression
- Primary Sources
- None
- Other Sources
Cell color indicative of annotation volume; red slash indicates species lacks structure or developmental stage.