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virulence, detoxification, adaptation
information pathways
cell wall and cell processes
stable RNAs
insertion seqs and phages
intermediary metabolism and respiration
regulatory proteins
conserved hypotheticals
lipid metabolism
General annotation
FunctionThe protein behaved as a porin of low specific activity. Structural protein that may protect the integrity of the bacterium.
ProductOuter membrane protein A OmpA
CommentsRv0899, (MTCY31.27), len: 326 aa. OmpA, outer membrane protein A (See Senaratne et al., 1998). C-terminal region similar to C-terminus of many members of the OmpA family of outer membrane proteins, e.g. NP_458280.1|NC_003198 putative outer membrane protein from Salmonella enterica subsp. enterica serovar Typhi (220); NP_418008.1|NC_000913 putative outer membrane protein from Escherichia coli strain K12 (219 aa), FASTA scores: opt: 296, E(): 2.2e-11, (45.3% identity in 117 aa overlap); NP_231844.1|NC_002505 outer membrane protein OmpA from Vibrio cholerae (321 aa); Q05146|OMPA_BORAV outer membrane protein A precursor from Bordetella avium (194 aa); etc. A signal peptide sequence probably exists at the N-terminus. N-terminal domain is necessary and sufficient for membrane translocation (See Alahari et al., 2007). Contains PS00044 Bacterial regulatory proteins, lysR family signature. Belongs to the OmpA family. Pore-forming activity is pH-dependent.
Functional categoryCell wall and cell processes
ProteomicsIdentified in the membrane fraction of M. tuberculosis H37Rv using nanoLC-MS/MS; predicted integral membrane protein (See Xiong et al., 2005). Putative glycoprotein identified by LC/ESI-MS/MS in the culture filtrate of M. tuberculosis H37Rv (See Gonzalez-Zamorano et al., 2009). Identified by mass spectrometry in Triton X-114 extracts of M. tuberculosis H37Rv (See Malen et al., 2010). Identified by mass spectrometry in the culture filtrate, membrane protein fraction, and whole cell lysates of M. tuberculosis H37Rv (See de Souza et al., 2011).
TranscriptomicsmRNA identified by RT-PCR (see citation below). Real-time PCR shows increased transcription during growth of M. tuberculosis H37Rv (streptomycin-resistant strain 1424) in low pH media, THP1 human monocytes, and murine bone marrow macrophages (See Raynaud et al., 2002).
MutantNon-essential gene for in vitro growth of H37Rv, by analysis of saturated Himar1 transposon libraries (see DeJesus et al. 2017). M. tuberculosis H37Rv (streptomycin-resistant strain 1424) ompA mutant shows impaired growth in low pH media, THP1 human monocytes, and murine bone marrow macrophages; mutant has reduced virulence in Balb/c mice (See Raynaud et al., 2002).
Check for mutants available at TARGET website
Genomic sequence
Feature type Upstream flanking region (bp) Downstream flanking region (bp) Update
Protein sequence
>Mycobacterium tuberculosis H37Rv|Rv0899|ompA