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1.B.36.1.1
The p13 porin (Ostberg et al. 2002). P13 displays a general (non-specific) channel-forming activity of 0.6 nanosiemens in 1 m KCl, has no preference for either cations or anions and shows no voltage-gating up to ±100 mV. The native P13 protein complex has a high molecular mass of about 300 kDa and is composed only of P13 monomers. The channel diameter was estimated to be about 1.4 nm with a 400-Da molecular mass cut-off (Bárcena-Uribarri et al. 2014).

Accession Number:Q7BSC0
Protein Name:Membrane protein P13
Length:179
Molecular Weight:19104.00
Species: [139]
Number of TMSs:4
Location1 / Topology2 / Orientation3: Membrane1 / Multi-pass membrane protein2
Substrate small molecules

Cross database links:

HEGENOM: HBG354601
RefSeq: NP_212168.1   
Entrez Gene ID: 1194870   
Pfam: PF05628   
BioCyc: BBUR224326:BB_0034-MONOMER   
KEGG: bbu:BB0034   

References (3)

[1] “P13, an integral membrane protein of Borrelia burgdorferi, is C-terminally processed and contains surface-exposed domains.”  Noppa L.et.al.   11292755
[2] “Genomic sequence of a Lyme disease spirochaete, Borrelia burgdorferi.”  Fraser C.M.et.al.   9403685
[3] “Molecular analysis of the channel-forming protein P13 and its paralogue family 48 from different Lyme disease Borrelia species.”  Pinne M.et.al.   14993304

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MNKLLIFVLA TFCVFSSFAQ ANDSKNGAFG MSAGEKLLVY ETSKQDPIVP FLLNLFLGFG 
61:	IGSFAQGDIL GGSLILGFDA VGIGLILAGA YLDIKALDGI TKKAAFQWTW GKGVMLAGVV 
121:	TMAVTRLTEI ILPFTFANSY NRKLKNSLNV ALGGFEPSFD VAMGQSSALG FELSFKKSY