In molecular biology the Bacterial Microcompartment (BMC) domain is a protein domain found in a variety of shell proteins, including CsoS1A, CsoS1B and CsoS1C of Thiobacillus neapolitanus (Halothiobacillus neapolitanus) and their orthologs from other bacteria. These shell proteins form the polyhedral structure of the carboxysome and related structures that plays a metabolic role in bacteria. The BMC domain consists of about 90 amino acid residues, characterized by β-α-β motif connected by a β-hairpin.
| BMC | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 carboxysome shell protein ccmk2 | |||||||||
| Identifiers | |||||||||
| Symbol | BMC | ||||||||
| Pfam | PF00936 | ||||||||
| InterPro | IPR000249 | ||||||||
| PROSITE | PDOC00876 | ||||||||
| CDD | cd06169 | ||||||||
| |||||||||
The majority of the shell proteins consist of a single BMC domain in each subunit, forming a hexameric structure that assembles to form the flat facets of the polyhedral shell.[1] To date, two shell proteins were found to consist a tandem BMC domains, of which forms a trimeric structure, giving a pseudo-hexameric appearance.[2][3]
References
edit- ^ Kerfeld CA, Sawaya MR, Tanaka S, Nguyen CV, Phillips M, Beeby M, Yeates TO (August 2005). "Protein structures forming the shell of primitive bacterial organelles". Science. 309 (5736): 936–8. CiteSeerX 10.1.1.1026.896. doi:10.1126/science.1113397. PMID 16081736. S2CID 24561197.
- ^ Heldt D, Frank S, Seyedarabi A, Ladikis D, Parsons JB, Warren MJ, Pickersgill RW (September 2009). "Structure of a trimeric bacterial microcompartment shell protein, EtuB, associated with ethanol utilization in Clostridium kluyveri". The Biochemical Journal. 423 (2): 199–207. doi:10.1042/BJ20090780. PMID 19635047. S2CID 22548122.
- ^ Pang A, Warren MJ, Pickersgill RW (February 2011). "Structure of PduT, a trimeric bacterial microcompartment protein with a 4Fe-4S cluster-binding site". Acta Crystallographica D. 67 (Pt 2): 91–6. doi:10.1107/S0907444910050201. PMID 21245529.