Porin (protein)

A sucrose specific porin from Salmonella typhimurium, a gram-negative bacterium. PDB: 1A0S
Gram-negative porin
Identifiers
SymbolPorin_08134891516
PfamPF00267
Pfam clanCL0193
InterProIPR001702
PROSITEPDOC00498
SCOP21mpf / SCOPe / SUPFAM
TCDB1.B.1
OPM superfamily31
OPM protein1pho
CDDcd01345
Available protein structures:
Pfam  structures / ECOD  
PDBRCSB PDB; PDBe; PDBj
PDBsumstructure summary

Porins are beta barrel proteins that cross a cellular membrane and act as a pore, through which molecules can diffuse.[1] Unlike other membrane transport proteins, porins are large enough to allow passive diffusion, i.e., they act as channels that are specific to different types of molecules. They are present in the outer membrane of gram-negative bacteria and some gram-positive mycobacteria (mycolic acid-containing actinomycetes), the outer membrane of mitochondria, and the outer chloroplast membrane (outer plastid membrane).

  1. ^ Porins at the U.S. National Library of Medicine Medical Subject Headings (MeSH)