Gene Rv2903c
in Mycobacterium tuberculosis H37Rv
General annotation
| Type | CDS |
| Function | Cleavage of N-terminal leader sequences from secreted protein precursors. |
| Product | Probable signal peptidase I LepB (SPASE I) (leader peptidase I). |
| Comments | Rv2903c, (MTCY274.34c), len: 294 aa. Probable lepB, signal peptidase I (type II membrane protein) (see Braunstein & Belisle 2000), equivalent to O33021|LEP_MYCLE|ML1612|MLCB250.39 probable signal peptidase I from Mycobacterium leprae (289 aa), FASTA scores: opt: 1335, E(): 1.8e-77, (69.75% identity in 301 aa overlap). Also similar to many e.g. O86869|SIPX signal peptidase I from Streptomyces lividans (320 aa), FASTA scores: opt: 474, E(): 1e-22, (43.55% identity in 248 aa overlap); O69884|SIP1|SIPW putative signal peptidase I from Streptomyces coelicolor and Streptomyces lividans (259 aa), FASTA scores: opt: 226, E(): 5e-07, (36.0% identity in 214 aa overlap); P42668|LEP_BACLI|sip signal peptidase I from Bacillus licheniformis (186 aa), FASTA scores: opt: 218, E(): 1.3e-06, (34.5% identity in 194 aa overlap); etc. Contains PS00501 Signal peptidases I serine active site,and PS00761 Signal peptidases I signature 3. Belongs to peptidase family S26; also known as type I leader peptidase family. Conserved in M. tuberculosis, M. leprae, M. bovis and M. avium paratuberculosis; predicted to be essential for in vivo survival and pathogenicity (See Ribeiro-Guimaraes and Pessolani, 2007). |
| Functional category | Cell wall and cell processes |
| Proteomics | Identified in the membrane fraction of M. tuberculosis H37Rv using nanoLC-MS/MS; predicted integral membrane protein (See Xiong et al., 2005). Identified by mass spectrometry in Triton X-114 extracts of M. tuberculosis H37Rv (See Malen et al., 2010). Identified by mass spectrometry in M. tuberculosis H37Rv-infected guinea pig lungs at 90 days but not 30 days (See Kruh et al., 2010). Identified by mass spectrometry in the membrane protein fraction and whole cell lysates of M. tuberculosis H37Rv but not the culture filtrate (See de Souza et al., 2011). |
| Transcriptomics | mRNA identified by microarray analysis and down-regulated after 24h and 96h of starvation (see Betts et al., 2002). |
| Mutant | Essential gene for in vitro growth of H37Rv in a MtbYM rich medium, by Himar1 transposon mutagenesis (see Minato et al. 2019). Essential gene for in vitro growth of H37Rv, by analysis of saturated Himar1 transposon libraries (see DeJesus et al. 2017). Essential gene by Himar1 transposon mutagenesis in H37Rv strain (see Sassetti et al., 2003). Essential gene for in vitro growth of H37Rv, by Himar1 transposon mutagenesis (See Griffin et al., 2011). Check for mutants available at TARGET website |
Coordinates
| Type | Start | End | Orientation |
|---|---|---|---|
| CDS | 3212970 | 3213854 | - |
Genomic sequence
Feature type
Upstream flanking region (bp)
Downstream flanking region (bp)
Update
Protein sequence
>Mycobacterium tuberculosis H37Rv|Rv2903c|lepB
VTETTDSPSERQPGPAEPELSSRDPDIAGQVFDAAPFDAAPDADSEGDSKAAKTDEPRPAKRSTLREFAVLAVIAVVLYYVMLTFVARPYLIPSESMEPTLHGCSTCVGDRIMVDKLSYRFGSPQPGDVIVFRGPPSWNVGYKSIRSHNVAVRWVQNALSFIGFVPPDENDLVKRVIAVGGQTVQCRSDTGLTVNGRPLKEPYLDPATMMADPSIYPCLGSEFGPVTVPPGRVWVMGDNRTHSADSRAHCPLLCTDDPLPGTVPVANVIGKARLIVWPPSRWGVVRSVNPQQGR
Bibliography
- Braunstein M and Belisle JT [2000]. Review
- Betts JC et al. [2002]. Evaluation of a nutrient starvation model of Mycobacterium tuberculosis persistence by gene and protein expression profiling. Transcriptome
- Dahl JL et al. [2003]. The role of RelMtb-mediated adaptation to stationary phase in long-term persistence of Mycobacterium tuberculosis in mice. Regulon
- Sassetti CM et al. [2003]. Genes required for mycobacterial growth defined by high density mutagenesis. Mutant
- Xiong Y, Chalmers MJ, Gao FP, Cross TA and Marshall AG [2005]. Identification of Mycobacterium tuberculosis H37Rv integral membrane proteins by one-dimensional gel electrophoresis and liquid chromatography electrospray ionization tandem mass spectrometry. Proteomics
- Ribeiro-Guimarães ML et al. [2007]. Comparative genomics of mycobacterial proteases. Homology
- Målen H et al. [2010]. Definition of novel cell envelope associated proteins in Triton X-114 extracts of Mycobacterium tuberculosis H37Rv. Proteomics
- Kruh NA et al. [2010]. Portrait of a pathogen: the Mycobacterium tuberculosis proteome in vivo. Proteomics
- de Souza GA et al. [2011]. Bacterial proteins with cleaved or uncleaved signal peptides of the general secretory pathway. Proteomics
- Griffin JE et al. [2011]. High-resolution phenotypic profiling defines genes essential for mycobacterial growth and cholesterol catabolism. Mutant
- DeJesus MA et al. [2017]. Comprehensive Essentiality Analysis of the Mycobacterium tuberculosis Genome via Saturating Transposon Mutagenesis. Mutant
- Minato Y et al. [2019]. Genomewide Assessment of Mycobacterium tuberculosis Conditionally Essential Metabolic Pathways. Mutant
