| ID | Sequence | Length | GC content |
|---|---|---|---|
| AGACACCGUGUCCUCUUGCCUGGGAGAGGGGAAGCAGAUCUGAGGACAU… | 1181 nt | 0.6037 | |
| AGACACCGUGUCCUCUUGCCUGGGAGAGGGGAAGCAGAUCUGAGGACAU… | 1330 nt | 0.6068 | |
| AGACACCGUGUCCUCUUGCCUGGGAGAGGGGAAGCAGAUCUGAGGACAU… | 964 nt | 0.5799 | |
| AGACACCGUGUCCUCUUGCCUGGGAGAGGGGAAGCAGAUCUGAGGACAU… | 1158 nt | 0.6002 |
This gene encodes the C-chain polypeptide of serum complement subcomponent C1q, which associates with C1r and C1s to yield the first component of the serum complement system. C1q is composed of 18 polypeptide chains which include 6 A-chains, 6 B-chains, and 6 C-chains. Each chain contains an N-terminal collagen-like region and a C-terminal C1q globular domain. C1q deficiency is associated with lupus erythematosus and glomerulonephritis. [provided by RefSeq, Dec 2016]
A study in mice demonstrated that the C1QC is a protein marker highly expressed in Spp1low Fabp4- macrophage clusters present in both control and radiation pneumonitis lung tissue [Yang et al. DOI:10.3390/antiox11081457]. A review of myocardial infarction research in mice and humans further identified the C1QC as a marker for pro-inflammatory and repair macrophages, with its genes (C1qa, C1qb, C1qc) being highly expressed in both M1 and M2 macrophage clusters [Xinxin Bian et al. DOI:10.3892/mmr.2025.13680].