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HighlightsIntroduction of CHRNA7
The α7 neuronal nicotinic acetylcholine receptor (α7nAChR) encoded by CHRNA7 gene, is a member of the nicotinic acetylcholine receptor family. The AChR is ligand-gated ion channel of five subunits, stimulated endogenously by acetylcholine, resulting in flux of the cations Na+, K+, and Ca2+. Eleven nicotinic receptor subunit genes are expressed in the human brain, including α2-7, 9, 10, and β2-4, which form multiple pentameric heteromers and a homomeric receptor, usually with only α7 subunits. Each subunit is a conserved N-terminal extracellular domain followed by three conserved transmembrane domains, a variable cytoplasmic loop, a fourth conserved transmembrane domain, and a short C-terminal extracellular region.
| Basic Information of CHRNA7 | |
| Protein Name | Neuronal acetylcholine receptor subunit alpha-7 |
| Gene Name | CHRNA7 |
| Aliases | NACHRA7 |
| Organism | Homo sapiens (Human) |
| UniProt ID | P36544 |
| Transmembrane Times | 4 |
| Length (aa) | 502 |
| Sequence | MRCSPGGVWLALAASLLHVSLQGEFQRKLYKELVKNYNPLERPVANDSQPLTVYFSLSLLQIMDVDEKNQVLTTNIWLQMSWTDHYLQWNVSEYPGVKTVRFPDGQIWKPDILLYNSADERFDATFHTNVLVNSSGHCQYLPPGIFKSSCYIDVRWFPFDVQHCKLKFGSWSYGGWSLDLQMQEADISGYIPNGEWDLVGIPGKRSERFYECCKEPYPDVTFTVTMRRRTLYYGLNLLIPCVLISALALLVFLLPADSGEKISLGITVLLSLTVFMLLVAEIMPATSDSVPLIAQYFASTMIIVGLSVVVTVIVLQYHHHDPDGGKMPKWTRVILLNWCAWFLRMKRPGEDKVRPACQHKQRRCSLASVEMSAVAPPPASNGNLLYIGFRGLDGVHCVPTPDSGVVCGRMACSPTHDEHLLHGGQPPEGDPDLAKILEEVRYIANRFRCQDESEAVCSEWKFAACVVDRLCLMAFSVFTIICTIGILMSAPNFVEAVSKDFA |
Function of CHRNA7 Membrane Protein
The CHRNA7 gene cluster is ubiquitously expressed in the human body and has roles in CNS and peripheral development, cognitive performance, and inflammation. It has been revealed that the dysfunction of α7nAChR is associated with mental and degenerative diseases. Besides, the early appearance of α7nAChR in evolution as an important source of calcium entry into the cell may explain its residual peripheral functions and development of synaptic roles. The CHRNA7 gene is the parent of other nicotinic receptors, and of a recent additional duplication to form the new gene, CHRFAM7A, only found in humans. Once this receptor binds acetylcholine, it undergoes an extensive change in conformation that affects all subunits and leads to opening of an ion-conducting channel across the plasma membrane.
Fig.1 Postulated mechanism for the interaction between CHRNA7 polymorphisms, APOE ε4 and smoking. (Weng, 2016)
Application of CHRNA7 Membrane Protein in Literature
This article finds a significant correlation between better ChEI response and CHRNA7 polymorphisms.
This article suggests that galantamine (AChEI) and donepezil (DP) induce upregulation of α7nAChR protein levels, which protect neurons from degeneration.
This article reports that the SNP rs6494223 of CHRNA7, as well as APOE∊4, could be helpful for understanding the response to ChEI treatment in patients with Alzheimer's disease.
This article reveals that α7 nAChR-dependent calcium signal cascades are down-regulated in both 15q13.3 deletion and duplication NPCs.
This article suggests that CHRNA7 expressed in TAMs in human CRC patients plays a significant role in preventing metastasis and could be a prognostic marker in CRCs which may be regulated by the JAK2/STAT3 signaling pathway.
Membrane protein studies have advanced significantly over the past few years. Based on our versatile Magic™ membrane protein production platform, we could offer a series of membrane protein preparation services for worldwide customers in reconstitution forms as well as multiple active formats. Aided by our versatile Magic™ anti-membrane protein antibody discovery platform, we also provide customized anti-CHRNA7 antibody development services.
During the past years, Creative Biolabs has successfully generated many functional membrane proteins for our global customers. We are happy to accelerate the development of our clients’ programs with our one-stop, custom-oriented service. For more detailed information, please feel free to contact us.
Reference
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