CXCL13
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 4ZAI, 5CBA, 5CBE
Identifiers
Aliases	CXCL13, ANGIE, ANGIE2, BCA-1, BCA1, BLC, BLR1L, SCYB13, C-X-C motif chemokine ligand 13
External IDs	OMIM: 605149 MGI: 1888499 HomoloGene: 48431 GeneCards: CXCL13
Gene location (Human) Chr. Chromosome 4 (human)[1] Band 4q21.1 Start 77,511,753 bp[1] End 77,611,834 bp[1]
Gene location (Mouse) Chr. Chromosome 5 (mouse)[2] Band 5|5 E3 Start 96,104,810 bp[2] End 96,108,927 bp[2]
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in spleen lymph node appendix rectum periodontal fiber thymus superficial temporal artery gallbladder pylorus gums Top expressed in spleen submandibular gland subcutaneous adipose tissue Paneth cell white adipose tissue external carotid artery left colon internal carotid artery secondary oocyte trachea More reference expression data BioGPS n/a
Gene ontology Molecular function receptor ligand activity CCR10 chemokine receptor binding cytokine activity heparin binding CXCR3 chemokine receptor binding chemokine activity protein heterodimerization activity fibroblast growth factor binding CXCR5 chemokine receptor binding Cellular component extracellular region extracellular space Biological process chemokine-mediated signaling pathway positive regulation of cytosolic calcium ion concentration cell-cell signaling germinal center formation regulation of angiogenesis chemotaxis endothelial cell chemotaxis to fibroblast growth factor regulation of humoral immune response cell surface receptor signaling pathway response to lipopolysaccharide regulation of cell population proliferation defense response to bacterium negative regulation of endothelial cell chemotaxis to fibroblast growth factor positive regulation of T cell chemotaxis immune response inflammatory response chronic inflammatory response defense response antimicrobial humoral immune response mediated by antimicrobial peptide regulation of signaling receptor activity G protein-coupled receptor signaling pathway lymphocyte chemotaxis across high endothelial venule positive regulation of integrin activation positive regulation of cell-cell adhesion mediated by integrin B cell chemotaxis activation of GTPase activity neutrophil chemotaxis leukocyte chemotaxis cellular response to lipopolysaccharide Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 10563 55985 Ensembl ENSG00000156234 ENSMUSG00000023078 UniProt O43927 O55038 RefSeq (mRNA) NM_006419 NM_001371558 NM_018866 RefSeq (protein) NP_006410 NP_001358487 NP_061354 Location (UCSC) Chr 4: 77.51 – 77.61 Mb Chr 5: 96.1 – 96.11 Mb PubMed search [3] [4]
Wikidata
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Chemokine (C-X-C motif) ligand 13 (CXCL13), also known as B lymphocyte chemoattractant (BLC) or B cell-attracting chemokine 1 (BCA-1), is a protein ligand that in humans is encoded by the CXCL13 gene.^[5][6]

Function

CXCL13 is a small chemokine belonging to the CXC chemokine family. As its other names suggest, this chemokine is selectively chemotactic for B cells belonging to both the B-1 and B-2 subsets, and elicits its effects by interacting with chemokine receptor CXCR5.^[5][7] CXCL13 and its receptor CXCR5 control the organization of B cells within follicles of lymphoid tissues^[8] and is expressed highly in the liver, spleen, lymph nodes, and gut of humans.^[5] The gene for CXCL13 is located on human chromosome 4 in a cluster of other CXC chemokines.^[6]

In T lymphocytes, CXCL13 expression is thought to reflect a germinal center origin of the T cell, particularly a subset of T cells called follicular B helper T cells (or T_FH cells). Hence, expression of CXCL13 in T-cell lymphomas, such as angioimmunoblastic T-cell lymphoma, is thought to reflect a germinal center origin of the neoplastic T-cells.^[9]