Corynebacterial porin B
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| PorB | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| Symbol | PorB | ||||||||
| Pfam | PF11565 | ||||||||
| InterPro | IPR021114 | ||||||||
| TCDB | 1.B.34 | ||||||||
| OPM superfamily | 190 | ||||||||
| OPM protein | 2vql | ||||||||
| |||||||||
Porins B and C are cell wall channel-forming proteins from Corynebacterium. Porin B from Corynebacterium glutamicum (Brevibacterium flavum) allows the exchange of material across the mycolic acid layer, which is the protective nonpolar barrier. Porin B has an alpha helical core structure consisting of four alpha-helices surrounding a nonpolar interior. There is a disulfide bridge between helices 1 and 4 to form a stable covalently bound ring.[1] The channel of PorB is oligomeric.[1]