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1.B.63.1.1
The CarO porin is slightly cation-selective and can be mutated to give rise to imipenem-resistance (Zhu et al. 2019). It is of 243 aas (Siroy et al. 2005) and plays a role in cabapenum resistance (Fonseca et al. 2013) as well as MDR (Yang et al. 2015).  It has been implicated in the uptake of ornithine as well as carbapenem antibiotics. Zahn et al. 2015 reported crystal structures of three isoforms of CarO. The structures show a monomeric eight-stranded barrel lacking an open channel. CarO has a substantial extracellular domain resembling a glove that contains all the divergent residues between the different isoforms. A6XB80 is another isoform with 77% identity to the one listed here in TCDB.

Accession Number:C0L0K3
Protein Name:CarO
Length:246
Molecular Weight:26506.00
Species:Acinetobacter baumannii [470]
Substrate cations, Imipenem, Carbapenem

Cross database links:

Structure:
4fuv     

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MKVLRVLVTT TALLAAGAAM ADEAVVHDSY AFDKNQLIPV GARAEVGTTG YGGALLWQAN 
61:	PYVGLALGYN GGDISWSDDV KVNGSTYDLD MDNNNVYLNA EIRPWGASTN RWAQGLYVAA 
121:	GAAYLDNDYD LTRNVDATRS FRVNNQDFIA GADGVKINGQ MSYKNDIAPY LGFGFAPKIN 
181:	KNWGVFGEVG AYYTGNPTVK LVSSGSAVTT GDQSLEEAVN AEARKIANDD KYKWLPVGKV 
241:	GVNFFW