Porin
From Proteopedia
Contents |
Function
The function on a porin depends on the size and lining of the channel.
Maltoporin (LamB) facilitates the diffusion of maltodextrin across the membrane[1].
Chitoporin (Chitp) facilitates the diffusion of chitooligosaccharides across the outer membrane of some bacteria[2].
Voltage-Dependent Anion Channel (VDAC) are ion channel Omps found in outer mitochondrial membrane[3]. In Pseudomonas aeruginosa the porin gene products are named OprD, OprE, OprK, OprP, etc. and OpdC, OpdH, etc.
For discussion of specific porins, see
- Mycobacterium tuberculosis ArfA Rv0899 for OmpA type
- Osmoporin OmpC (E. coli)
- OmpF
- Molecular Playground/OmpG
- Molecular Playground/OmpG2
- Osmoporin OmpK36 (K. pneumoniae)
Structure
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Acknowledgement
The scene showing channels as pseudoatoms is from a page (User:Eric_Martz/Sandbox_19) made by Eric Martz. Eric also helped creating the surface rendition of the channels (technical details here: Image:Tunnels.jvxl).
References
- ↑ Van Gelder P, Dumas F, Bartoldus I, Saint N, Prilipov A, Winterhalter M, Wang Y, Philippsen A, Rosenbusch JP, Schirmer T. Sugar transport through maltoporin of Escherichia coli: role of the greasy slide. J Bacteriol. 2002 Jun;184(11):2994-9. PMID:12003940
- ↑ Suginta W, Chumjan W, Mahendran KR, Schulte A, Winterhalter M. Chitoporin from Vibrio harveyi, a channel with exceptional sugar specificity. J Biol Chem. 2013 Apr 19;288(16):11038-46. PMID:23447539 doi:10.1074/jbc.M113.454108
- ↑ Shoshan-Barmatz V, Israelson A, Brdiczka D, Sheu SS. The voltage-dependent anion channel (VDAC): function in intracellular signalling, cell life and cell death. Curr Pharm Des. 2006;12(18):2249-70. PMID:16787253
- ↑ Basle A, Rummel G, Storici P, Rosenbusch JP, Schirmer T. Crystal structure of osmoporin OmpC from E. coli at 2.0 A. J Mol Biol. 2006 Oct 6;362(5):933-42. Epub 2006 Aug 3. PMID:16949612 doi:10.1016/j.jmb.2006.08.002
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