1.B.80 The Putative Trans-Outer Membrane Electron Flow Porin (TOM-EF) Family

Putative porins of 400 - 450 aas with an N-terminal hydrophobic leader sequence followed by about 20 β-strands, probably in a β-barrel, comprise this family.  They are constituents of functionally characterized transmembrane electron flow complexes, also including periplasmic and outer membrane cytochrome c homologues.  These complexes are presented in a family with TC#5.B.8.  See this TC family for a more detailed description (Liu et al. 2015). 

CDD recognizes these proteins as members of Porin Superfamily I (see superfamily hyperlink in TCDB).  It is not expected that all of these porins function in trans outer membrane electron flow, but this possibility has yet to be tested.


This family belongs to the Outer Membrane Pore-forming Protein I (OMPP-I) Superfamily .
 

References:

Liu, Y., J.K. Fredrickson, J.M. Zachara, and L. Shi. (2015). Direct involvement of ombB, omaB, and omcB genes in extracellular reduction of Fe(III) by Geobacter sulfurreducens PCA. Front Microbiol 6: 1075.
Examples:

TC#NameOrganismal TypeExample
1.B.80.1.1

Putative outer membrane porin, possibly involved in trans outer membrane electon flow, of 444 aas (Liu et al. 2015)

OM porin of Anaeromyxobacter dehalogenans

 
1.B.80.1.2

Putative porin of 526 aas

PP of Plesiocystis pacifica

 
1.B.80.1.3

Putative porin of 475 aas

PP of Denitrovibrio acetiphilus

 
1.B.80.1.4

Putative porin of 464 aas

PP of Stigmatella aurantiaca

 
1.B.80.1.5

Putative porin of 574 aas

PP of Sorangium cellulosum (Polyangium cellulosum

 
Examples:

TC#NameOrganismal TypeExample
1.B.80.2.1

Putative porin of 515 aas and 24 predicted β-strand

PP of Thiolapillus brandeum

 
1.B.80.2.2

Putative porin of 470 aas and 22 predicted β-strands.

PP of Methylococcus capsulatus

 
1.B.80.2.3

Putative porin of 418 aas

PP of Desulfurobacterium thermolithotrophum

 
1.B.80.2.4

Putative porin of 424 aas

PP of Thermovibrio ammonificans

 
1.B.80.2.5

Putative porin of 421 aas

PP of Melioribacter roseus

 
Examples:

TC#NameOrganismal TypeExample