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1.B.64.1.1
Omp2a porin of 386 aas. The 3-d structure reveals a 16-stranded β-barrel with an α-helix on the third loop folding inside the barrel and forming the constriction zone of the channel, a typical feature of general porins (Lopes-Rodrigues et al. 2019). The preferential diffusion of cations over anions has been experimentally observed.  Transports maltotetraose (Lopes-Rodrigues et al. 2019).

Accession Number:Q44618
Protein Name:Omp2a
Length:386
Molecular Weight:40632.00
Species:Brucella abortus [235]
Number of TMSs:3
Location1 / Topology2 / Orientation3: Cell membrane1 / Peripheral membrane protein2
Substrate Sugars

Cross database links:

Pfam: PF05244   

References (1)

[1] “Species-specific sequences at the omp2 locus of Brucella type strains.”  Ficht T.A.et.al.   8573514

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MLHEGNKKPG ISAGFLYPIR NGLERTLEAN DTAPSIVFSN GVLPLATKLG VGNFRRNGEA 
61:	RNQFVSNVSR NCRLAPVVMR SLQVEGSLLR SLILQTTPDS PIAAPLAVVL IRRSSGRICA 
121:	LQPNRELVGD VDVATNLGSP FFDDRVIGNN TSDRTPAASI LQAANNVRHV AVDVVVGRAS 
181:	VTTVVVATLF ESDHSREAVS ASEGVRDLAG AVGASRDHVI VDDIAEVTGE GMEFRFIDTN 
241:	AQTTELDIRE LHDGAAAGFI TIFTIYARIV RSIVEAQFGE GLEGAEFGFR TGGNAECETS 
301:	ALVPAIAVGT GVNVIAALYV VTDVTMDAQA GFGARNVEVA SAVSVANADI FNGFGLWRDD 
361:	CVGSLSAGSC NQSCSGAKEK ALDVHF