Go to browser
virulence, detoxification, adaptation
lipid metabolism
conserved hypotheticals
pseudogenes
information pathways
cell wall and cell processes
stable RNAs
insertion seqs and phages
PE/PPE
intermediary metabolism and respiration
unknown
regulatory proteins
General annotation
TypeCDS
FunctionMultifunctional enzyme, exhibiting both a catalase, a broad-spectrum peroxidase, and a peroxynitritase activities. May play a role in the intracellular survival of mycobacteria within macrophages; protection against reactive oxygen and nitrogen intermediates produced by phagocytic cells. Seems regulated by SIGB|Rv2710 [catalytic activity: 2 H(2)O(2) = O(2) + 2 H(2)O].
ProductCatalase-peroxidase-peroxynitritase T KatG
CommentsRv1908c, (MTCY180.10), len: 740 aa. KatG, catalase-peroxidase-peroxynitritase T (see citations below), HPI. FASTA results: Q57215 catalase-peroxidase from Mycobacterium tuberculosis (740 aa) opt: 5081, E(): 0, (100% identity in 740 aa overlap). Contains peroxidases active site signature (PS00436) and ATP/GTP-binding site motif A (P-loop; PS00017). Cosmid sequence was corrected to agree with a sequencing read from the H37Rv genome. Deletions or defects in KATG gene cause isoniazid (INH) resistance. Belongs to the peroxidase family. Bacterial peroxidase/catalase subfamily. KATG transcription seems to be regulated by FURA|Rv1909c product. The catalase-peroxidase activity is associated with the amino-terminal domain but no definite function has been assigned to the carboxy-terminal domain. Predicted possible vaccine candidate (See Zvi et al., 2008). Rv1908c, (MTCY180.10), len: 740 aa. KatG, catalase-peroxidase-peroxynitritase T (see citations below), HPI. FASTA results: Q57215 catalase-peroxidase from Mycobacterium tuberculosis (740 aa) opt: 5081, E(): 0, (100% identity in 740 aa overlap). Contains peroxidases active site signature (PS00436) and ATP/GTP-binding site motif A (P-loop; PS00017). Cosmid sequence was corrected to agree with a sequencing read from the H37Rv genome. Deletions or defects in KATG gene cause isoniazid (INH) resistance. Belongs to the peroxidase family. Bacterial peroxidase/catalase subfamily. KATG transcription seems to be regulated by FURA|Rv1909c product. The catalase-peroxidase activity is associated with the amino-terminal domain but no definite function has been assigned to the carboxy-terminal domain. Predicted possible vaccine candidate (See Zvi et al., 2008).
Functional categoryVirulence, detoxification, adaptation
ProteomicsThe product of this CDS corresponds to spot katG identified in cell wall by proteomics at the Statens Serum Institute (Denmark) (see Rosenkrands et al., 2000a; 2000b). Also identified in two-dimensional gel electrophoresis and by mass spectrometry, particularly in standing cultures (see Florczyk et al., 2001). 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 cytosol and cell membrane fraction of M. tuberculosis H37Rv using 2DLC/MS (See Mawuenyega et al., 2005). Identified in the membrane fraction of M. tuberculosis H37Rv using nanoLC-MS/MS (See Xiong et al., 2005). Identified in culture filtrates of M. tuberculosis H37Rv (See Malen et al., 2007). 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). Translational start site supported by proteomics data (See de Souza et al., 2011) (See Kelkar et al., 2011).
Mutationnon essential gene by Himar1-based transposon mutagenesis in H37Rv and CDC1551 strains (see Sassetti et al., 2003 and Lamichhane et al., 2003). Essential gene for in vitro growth of H37Rv, by sequencing of Himar1-based transposon mutagenesis (See Griffin et al., 2011). Found to be deleted (partially or completely) in one or more clinical isolates (See Tsolaki et al., 2004).
Check for mutants available at TARGET website
Coordinates
TypeStartEndOrientation
CDS21538892156111-
RBS21561172156121-
Genomic sequence
Feature type Upstream flanking region (bp) Downstream flanking region (bp) Update
      
Protein sequence
>Mycobacterium tuberculosis H37Rv|Rv1908c|katG
VPEQHPPITETTTGAASNGCPVVGHMKYPVEGGGNQDWWPNRLNLKVLHQNPAVADPMGAAFDYAAEVATIDVDALTRDIEEVMTTSQPWWPADYGHYGPLFIRMAWHAAGTYRIHDGRGGAGGGMQRFAPLNSWPDNASLDKARRLLWPVKKKYGKKLSWADLIVFAGNCALESMGFKTFGFGFGRVDQWEPDEVYWGKEATWLGDERYSGKRDLENPLAAVQMGLIYVNPEGPNGNPDPMAAAVDIRETFRRMAMNDVETAALIVGGHTFGKTHGAGPADLVGPEPEAAPLEQMGLGWKSSYGTGTGKDAITSGIEVVWTNTPTKWDNSFLEILYGYEWELTKSPAGAWQYTAKDGAGAGTIPDPFGGPGRSPTMLATDLSLRVDPIYERITRRWLEHPEELADEFAKAWYKLIHRDMGPVARYLGPLVPKQTLLWQDPVPAVSHDLVGEAEIASLKSQIRASGLTVSQLVSTAWAAASSFRGSDKRGGANGGRIRLQPQVGWEVNDPDGDLRKVIRTLEEIQESFNSAAPGNIKVSFADLVVLGGCAAIEKAAKAAGHNITVPFTPGRTDASQEQTDVESFAVLEPKADGFRNYLGKGNPLPAEYMLLDKANLLTLSAPEMTVLVGGLRVLGANYKRLPLGVFTEASESLTNDFFVNLLDMGITWEPSPADDGTYQGKDGSGKVKWTGSRVDLVFGSNSELRALVEVYGADDAQPKFVQDFVAAWDKVMNLDRFDVR
      
Bibliography