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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
FunctionNecessary for efficient export of extra-cytoplasmic proteins. Binds to the signal sequence when it emerges from the ribosomes.
ProductProbable signal recognition particle protein Ffh (fifty-four homolog) (SRP protein)
CommentsRv2916c, (MTCY338.04c), len: 525 aa. Probable ffh, signal recognition particle (SRP) protein (ala-, gly-, leu-rich protein) (see citation below), equivalent to O33013|SR54_MYCLE signal recognition particle from Mycobacterium leprae (521 aa), FASTA scores: opt: 2968, E(): 1.6e-145, (87.85% identity in 526 aa overlap). Also highly similar to others e.g. O69874|FFH from Streptomyces coelicolor (550 aa), FASTA scores: opt: 2025, E(): 6e-97, (63.8% identity in 519 aa overlap) (N-terminus longer 34 aa); P37105|SR54_BACSU from Bacillus subtilis (446 aa), FASTA scores: opt: 1451, E(): 1.9e-67, (51.5% identity in 435 aa overlap); BAB57399|FFH from Staphylococcus aureus subsp. aureus Mu50 (455 aa), FASTA scores: opt: 1418, E(): 9.4e-66, (48.65% identity in 448 aa overlap); etc. Contains PS00017 ATP/GTP-binding site motif A (P-loop). Belongs to the SRP family of GTP-binding proteins. Note that signal recognition particle consists of a small cytoplasmic RNA (SC-RNA) molecule and protein FFH. The protein has a two domain structure: the G-domain binds GTP; the M-domain binds the RNA and also binds the signal sequence.
Functional categoryCell wall and cell processes
ProteomicsIdentified in the cell wall and cell membrane fractions 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 by mass spectrometry in whole cell lysates of M. tuberculosis H37Rv but not the culture filtrate or membrane protein fraction (See de Souza et al., 2011). Translational start site supported by proteomics data (See Kelkar et al., 2011).
MutantEssential 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
Genomic sequence
Feature type Upstream flanking region (bp) Downstream flanking region (bp) Update
Protein sequence
>Mycobacterium tuberculosis H37Rv|Rv2916c|ffh