Gene Rv2245
in Mycobacterium tuberculosis H37Rv
General annotation
| Type | CDS |
| Function | Involved in fatty acid biosynthesis (mycolic acids synthesis); involved in meromycolate extension. Catalyzes the condensation reaction of fatty acid synthesis by the addition to an acyl acceptor of two carbons from malonyl-ACP [catalytic activity: acyl-[acyl-carrier protein] + malonyl-[acyl-carrier protein] = 3-oxoacyl-[acyl-carrier protein] + [acyl-carrier protein] + CO(2)]. |
| Product | 3-oxoacyl-[acyl-carrier protein] synthase 1 KasA (beta-ketoacyl-ACP synthase) (KAS I) |
| Comments | Rv2245, (MTCY427.26), len: 416 aa. KasA, beta-ketoacyl-ACP synthase, involved in meromycolate extension (see citations below): belongs to the fas-II system, which utilizes primarily palmitoyl-ACP rather than short-chain acyl-ACP primers. Highly similar to others e.g. L43074|STMFABD3|g870805 beta-ketoacyl-ACP synthase from Streptomyces glaucescens (423 aa), FASTA scores: opt: 1105, E(): 0, (44.6% identity in 417 aa overlap); FABF_ECOLI|P39435 3-oxoacyl-[acyl-carrier-protein] synthase II from Escherichia coli, FASTA score: (39.4% identity in 254 aa overlap); FABB_HORVU|P23902 3-oxoacyl-[acyl-carrier-protein] synthase I, FASTA score: (33.4% identity in 413 aa overlap); etc. Strongest similarity to downstream ORF kasB|Rv2246|MTCY427.27 3-oxoacyl-[acyl-carrier-protein] synthase 2 from Mycobacterium tuberculosis (438 aa), FASTA score: (66.3% identity in 409 aa overlap). Belongs to the beta-ketoacyl-ACP synthases family. |
| Functional category | Lipid metabolism |
| Proteomics | Identified in the membrane fraction of M. tuberculosis H37Rv using 1D-SDS-PAGE and uLC-MS/MS (See Gu et al., 2003). Identified in the cell wall and cell membrane fractions of M. tuberculosis H37Rv using 2DLC/MS (See Mawuenyega 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 culture filtrate, membrane protein fraction, and whole cell lysates of M. tuberculosis H37Rv (See de Souza et al., 2011). |
| Transcriptomics | mRNA identified by DNA microarray analysis (gene induced by isoniazid (INH) or ethionamide treatment) (see Wilson et al., 1999). mRNA also identified by other microarray analysis and real-time RT-PCR; transcription up-repressed at low pH in vitro conditions, which may mimic an environmental signal encountered by phagocytosed bacteria (see Fisher et al., 2002). mRNA expression also studied in human lung granulomas of tuberculosis patients (see Fenhalls 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 | 2518115 | 2519365 | + |
Genomic sequence
Feature type
Upstream flanking region (bp)
Downstream flanking region (bp)
Update
Protein sequence
>Mycobacterium tuberculosis H37Rv|Rv2245|kasA
VSQPSTANGGFPSVVVTAVTATTSISPDIESTWKGLLAGESGIHALEDEFVTKWDLAVKIGGHLKDPVDSHMGRLDMRRMSYVQRMGKLLGGQLWESAGSPEVDPDRFAVVVGTGLGGAERIVESYDLMNAGGPRKVSPLAVQMIMPNGAAAVIGLQLGARAGVMTPVSACSSGSEAIAHAWRQIVMGDADVAVCGGVEGPIEALPIAAFSMMRAMSTRNDEPERASRPFDKDRDGFVFGEAGALMLIETEEHAKARGAKPLARLLGAGITSDAFHMVAPAADGVRAGRAMTRSLELAGLSPADIDHVNAHGTATPIGDAAEANAIRVAGCDQAAVYAPKSALGHSIGAVGALESVLTVLTLRDGVIPPTLNYETPDPEIDLDVVAGEPRYGDYRYAVNNSFGFGGHNVALAFGRY
Bibliography
- Cole ST et al. [1998]. Deciphering the biology of Mycobacterium tuberculosis from the complete genome sequence. Sequence Secondary
- Wilson M, DeRisi J, Kristensen HH, Imboden P, Rane S, Brown PO and Schoolnik GK [1999]. Exploring drug-induced alterations in gene expression in Mycobacterium tuberculosis by microarray hybridization. Regulation
- Kremer L, Baulard AR and Besra GS [2000]. Review
- Schaeffer ML et al. [2001]. Purification and biochemical characterization of the Mycobacterium tuberculosis beta-ketoacyl-acyl carrier protein synthases KasA and KasB. Secondary Biochemistry
- Slayden RA et al. [2002]. The role of KasA and KasB in the biosynthesis of meromycolic acids and isoniazid resistance in Mycobacterium tuberculosis. Gene
- Kremer L et al. [2002]. Mycolic acid biosynthesis and enzymic characterization of the beta-ketoacyl-ACP synthase A-condensing enzyme from Mycobacterium tuberculosis. Product Biochemistry Function Mutant
- Kremer L et al. [2002]. Temperature-induced changes in the cell-wall components of Mycobacterium thermoresistibile. Homolog Product Regulation
- Fisher MA, Plikaytis BB and Shinnick TM [2002]. Microarray analysis of the Mycobacterium tuberculosis transcriptional response to the acidic conditions found in phagosomes. Transcriptome Regulation
- Fenhalls G, Stevens L, Moses L, Bezuidenhout J, Betts JC, Helden Pv P, Lukey PT and Duncan K [2002]. In situ detection of Mycobacterium tuberculosis transcripts in human lung granulomas reveals differential gene expression in necrotic lesions. Transcriptome Regulation
- Gu S et al. [2003]. Comprehensive proteomic profiling of the membrane constituents of a Mycobacterium tuberculosis strain. Proteomics
- Sassetti CM et al. [2003]. Genes required for mycobacterial growth defined by high density mutagenesis. Mutant
- Mawuenyega KG et al. [2005]. Mycobacterium tuberculosis functional network analysis by global subcellular protein profiling. Proteomics
- Bhatt A, Molle V, Besra GS, Jacobs WR and Kremer L [2007]. The Mycobacterium tuberculosis FAS-II condensing enzymes: their role in mycolic acid biosynthesis, acid-fastness, pathogenesis and in future drug development. Review
- Kruh NA et al. [2010]. Portrait of a pathogen: the Mycobacterium tuberculosis proteome in vivo. Proteomics
- Målen H et al. [2010]. Definition of novel cell envelope associated proteins in Triton X-114 extracts of Mycobacterium tuberculosis H37Rv. 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
