Introduction of CLCA1
CLCA1 encoding calcium-activated chloride channel regulator 1 is member of calcium-activated chloride channel regulator family (CLCA, previously known as chloride channel calcium activated). CLCA proteins are a group of secreted self-cleaving metalloproteases that activate calcium-dependent chloride currents (ICaCC) in mammalian cells. To date, all members of this gene family map to the same region on chromosome 1p31-p22 and share a high degree of homology in size and sequence, but differ significantly in their tissue distributions. CLCA1 is highly expressed in small intestine and colon namely in intestinal basal crypt epithelia and goblet cells, and appendix. And it is weakly expressed in uterus, testis and kidney.
|Basic Information of CLCA1|
|Protein Name||Calcium-activated chloride channel regulator 1|
|Aliases||Calcium-activated chloride channel family member 1(hCLCA1), Calcium-activated chloride channel protein 1(CaCC-1, hCaCC-1)|
|Organism||Homo sapiens (Human)|
Function of CLCA1 Membrane Protein
The goblet cell-derived protein CLCA1 (chloride channel regulator, calcium-activated is thought to act as a multifunctional signaling protein via as yet unidentified molecular pathways. Originally, CLCA1 had been thought to modulate epithelial cell chloride conductance. However, subsequent work has shown that it may also induce airway mucus production through an interleukin (IL)-13-mediated cascade and promote spontaneous differentiation while reducing proliferation of Caco-2 cells. In a similar context, CLCA1 expression was proposed as a prognostic factor in colorectal cancer. In early immune responses, CLCA1 was shown to modulate pulmonary cytokine expression, specifically the pro-inflammatory response of human airway macrophages in vitro.
Fig.1 Model for CLCA1 modulation of TMEM16A-mediated calcium-dependent chloride currents (Sala-Rabanal, 2015)
Application of CLCA1 Membrane Protein in Literature
This article finds that no relevant differences between wild-type and Clca1-deficient mice under steady state or DSS-challenged conditions in mouse colon. Clca1 is not required for mucus synthesis, structure and barrier function in the murine colon.
This article suggests that CLCA1 is involved in the modulation of cytokine responses in the colon, albeit differently than what had been observed in the lungs.
This article recently reveals the function of CLCA1 and mechanistically how it activates chloride currents through TMEM16A.
This article reveals that HO-1 overexpression suppresses IL-13-induced goblet cell hyperplasia and MUC5AC production, and involvement of CLCA1 in the mechanism is suggested.
This article suggests an apparent effect of CLCA1 on cancer cell aggregation by inhibitor and siRNA transfection studies.
CLCA1 Preparation Options
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