Biology:BtpA protein
| BtpA | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| Symbol | BtpA | ||||||||
| Pfam | PF03437 | ||||||||
| Pfam clan | CL0036 | ||||||||
| InterPro | IPR005137 | ||||||||
| |||||||||
In molecular biology, the BtpA protein family is a family of proteins which includes BtpA. BtpA appears to play a role in the stabilisation of photosystem I .[1] It is an extrinsic membrane protein located on the cytoplasmic side of the thylakoid membrane.[1][2] Homologs of BtpA are found in the Thermoproteota and "Euryarchaeota", where their function remains unknown. The Ycf4 protein is firmly associated with the thylakoid membrane, presumably through a transmembrane domain.[3] Ycf4 co-fractionates with a protein complex larger than PSI upon sucrose density gradient centrifugation of solubilised thylakoids.[3] The Ycf3 protein is loosely associated with the thylakoid membrane and can be released from the membrane with sodium carbonate. This suggests that Ycf3 is not part of a stable complex and that it probably interacts transiently with its partners.[4] Ycf3 contains a number of tetratricopeptide repeats (TPR); TPR is a structural motif present in a wide range of proteins, which mediates protein-protein interactions.
References
- ↑ 1.0 1.1 "The BtpA protein stabilizes the reaction center proteins of photosystem I in the cyanobacterium Synechocystis sp. PCC 6803 at low temperature". Plant Physiol. 123 (1): 215–22. May 2000. doi:10.1104/pp.123.1.215. PMID 10806238.
- ↑ "Subcellular localization of the BtpA protein in the cyanobacterium Synechocystis sp. PCC 6803". Eur. J. Biochem. 261 (1): 311–6. April 1999. doi:10.1046/j.1432-1327.1999.00281.x. PMID 10103064.
- ↑ 3.0 3.1 "The chloroplast ycf3 and ycf4 open reading frames of Chlamydomonas reinhardtii are required for the accumulation of the photosystem I complex". EMBO J. 16 (20): 6095–104. October 1997. doi:10.1093/emboj/16.20.6095. PMID 9321389.
- ↑ "Functional studies of Ycf3: its role in assembly of photosystem I and interactions with some of its subunits". Plant Cell 13 (12): 2731–45. December 2001. doi:10.2307/3871531. PMID 11752384.
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