Overview
| Uniprot ID | P01619 |
|---|
| Protein Name | Immunoglobulin kappa variable 3-20 |
|---|
| Gene Name | IGKV3-20 |
|---|
| Organism | Homo sapiens |
|---|
Kla Sites from experimental identification
| Position |
Flanking peptide |
| 60 |
YLAWYQQKPGQAPRL |
Function
V region of the variable domain of immunoglobulin light chains that participates in the antigen recognition (PubMed:24600447). Immunoglobulins, also known as antibodies, are membrane-bound or secreted glycoproteins produced by B lymphocytes. In the recognition phase of humoral immunity, the membrane-bound immunoglobulins serve as receptors which, upon binding of a specific antigen, trigger the clonal expansion and differentiation of B lymphocytes into immunoglobulins-secreting plasma cells. Secreted immunoglobulins mediate the effector phase of humoral immunity, which results in the elimination of bound antigens (PubMed:20176268, PubMed:22158414). The antigen binding site is formed by the variable domain of one heavy chain, together with that of its associated light chain. Thus, each immunoglobulin has two antigen binding sites with remarkable affinity for a particular antigen. The variable domains are assembled by a process called V-(D)-J rearrangement and can then be subjected to somatic hypermutations which, after exposure to antigen and selection, allow affinity maturation for a particular antigen (PubMed:17576170, PubMed:20176268)
Protein Sequence
10
METPAQLLFL
20
LLLWLPDTTG
30
EIVLTQSPGT
40
LSLSPGERAT
50
LSCRASQSVS
60
SSYLAWYQQK
70
PGQAPRLLIY
80
GASSRATGIP
90
DRFSGSGSGT
100
DFTLTISRLE
110
PEDFAVYYCQ
QYGSSP
Gene Ontology
| Classification |
GO ID |
Description |
| Cellular Component |
GO:0072562 |
blood microparticle |
| Cellular Component |
GO:0070062 |
extracellular exosome |
| Cellular Component |
GO:0005576 |
extracellular region |
| Cellular Component |
GO:0005615 |
extracellular space |
| Cellular Component |
GO:0019814 |
immunoglobulin complex |
| Cellular Component |
GO:0071748 |
monomeric IgA immunoglobulin complex |
| Cellular Component |
GO:0071756 |
pentameric IgM immunoglobulin complex |
| Cellular Component |
GO:0005886 |
plasma membrane |
| Cellular Component |
GO:0071751 |
secretory IgA immunoglobulin complex |
| Molecular Function |
GO:0003823 |
antigen binding |
| Biological Process |
GO:0002250 |
adaptive immune response |
| Biological Process |
GO:0019731 |
antibacterial humoral response |
| Biological Process |
GO:0003094 |
glomerular filtration |
| Biological Process |
GO:0006955 |
immune response |
Reference
[1] Yang Z, Yan C, Ma J, Peng P, Ren X et al.. Lactylome analysis suggests lactylation-dependent mechanisms of metabolic adaptation in hepatocellular carcinoma.. Nat Metab 5(1):61-79. 2023 Jan. PMID: 36593272.