Reviewed, UniProtKB/Swiss-Prot Q10789 (LEP_MYCTU)

Names and origin

Protein names

Recommended name:
    Probable signal peptidase I
      Short name=SPase I
    EC=3.4.21.89
Alternative name(s):
    Leader peptidase I

Gene names

Name:	lepB
Ordered Locus Names:	Rv2903c, MT2971
ORF Names:	MTCY274.34c

Organism

Mycobacterium tuberculosis [Complete proteome] [HAMAP]

Taxonomic identifier

1773 [NCBI]

Taxonomic lineage

Bacteria › Actinobacteria › Actinobacteridae › Actinomycetales › Corynebacterineae › Mycobacteriaceae › Mycobacterium › Mycobacterium tuberculosis complex

Protein attributes

Sequence length	294 AA.
Sequence status	Complete.
Protein existence	Inferred from homology.

General annotation (Comments)

Catalytic activity	Cleavage of hydrophobic, N-terminal signal or leader sequences from secreted and periplasmic proteins.
Subcellular location	Cell membrane; Single-pass type II membrane protein By similarity.
Miscellaneous	Was identified as a high-confidence drug target.
Sequence similarities	Belongs to the peptidase S26 family.

Ontologies

Keywords
Cellular component	Cell membrane Membrane
Domain	Transmembrane
Molecular function	Hydrolase Protease
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	proteolysis Inferred from electronic annotation. Source: InterPro
Cellular component	integral to membrane Inferred from electronic annotation. Source: UniProtKB-SubCell plasma membrane Inferred from electronic annotation. Source: UniProtKB-KW
Molecular function	serine-type peptidase activity Inferred from electronic annotation. Source: InterPro
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 294	294	Probable signal peptidase I		PRO_0000109511
Regions
	Topological domain	1 – 66	66	Cytoplasmic Potential
	Transmembrane	67 – 87	21	Potential
	Topological domain	88 – 294	207	Extracellular Potential
Sites
	Active site	96	1	By similarity
	Active site	174	1	By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q10789-1 [UniParc]. Last modified October 1, 1996. Version 1. Checksum: BBCAE8ADF68F897D	FASTA	294	31,880
	10 20 30 40 50 60 MTETTDSPSE RQPGPAEPEL SSRDPDIAGQ VFDAAPFDAA PDADSEGDSK AAKTDEPRPA 70 80 90 100 110 120 KRSTLREFAV LAVIAVVLYY VMLTFVARPY LIPSESMEPT LHGCSTCVGD RIMVDKLSYR 130 140 150 160 170 180 FGSPQPGDVI VFRGPPSWNV GYKSIRSHNV AVRWVQNALS FIGFVPPDEN DLVKRVIAVG 190 200 210 220 230 240 GQTVQCRSDT GLTVNGRPLK EPYLDPATMM ADPSIYPCLG SEFGPVTVPP GRVWVMGDNR 250 260 270 280 290 THSADSRAHC PLLCTDDPLP GTVPVANVIG KARLIVWPPS RWGVVRSVNP QQGR

References

[1]	"Deciphering the biology of Mycobacterium tuberculosis from the complete genome sequence." Cole S.T., Brosch R., Parkhill J., Garnier T., Churcher C.M., Harris D.E., Gordon S.V., Eiglmeier K., Gas S., Barry C.E. III, Tekaia F., Badcock K., Basham D., Brown D., Chillingworth T., Connor R., Davies R.M., Devlin K. , Feltwell T., Gentles S., Hamlin N., Holroyd S., Hornsby T., Jagels K., Krogh A., McLean J., Moule S., Murphy L.D., Oliver S., Osborne J., Quail M.A., Rajandream M.A., Rogers J., Rutter S., Seeger K., Skelton S., Squares S., Squares R., Sulston J.E., Taylor K., Whitehead S., Barrell B.G. Nature 393:537-544(1998) [PubMed: 9634230] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC 25618 / H37Rv.
[2]	"Whole-genome comparison of Mycobacterium tuberculosis clinical and laboratory strains." Fleischmann R.D., Alland D., Eisen J.A., Carpenter L., White O., Peterson J.D., DeBoy R.T., Dodson R.J., Gwinn M.L., Haft D.H., Hickey E.K., Kolonay J.F., Nelson W.C., Umayam L.A., Ermolaeva M.D., Salzberg S.L., Delcher A., Utterback T.R. , Weidman J.F., Khouri H.M., Gill J., Mikula A., Bishai W., Jacobs W.R. Jr., Venter J.C., Fraser C.M. J. Bacteriol. 184:5479-5490(2002) [PubMed: 12218036] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: CDC 1551 / Oshkosh.
[3]	"targetTB: a target identification pipeline for Mycobacterium tuberculosis through an interactome, reactome and genome-scale structural analysis." Raman K., Yeturu K., Chandra N. BMC Syst. Biol. 2:109-109(2008) [PubMed: 19099550] [Abstract] Cited for: IDENTIFICATION AS A DRUG TARGET [LARGE SCALE ANALYSIS].

Cross-references

Sequence databases
EMBL GenBank DDBJ	BX842581 Genomic DNA. Translation: CAA98341.1. AE000516 Genomic DNA. Translation: AAK47297.1.
PIR	B70927.
RefSeq	NP_217419.1. NP_337483.1.
3D structure databases
SMR	Q10789. Positions 84-287.
ModBase	Search...
Genome annotation databases
GeneID	887157. 925307.
GenomeReviews	Gene locus MT2971 in contig AE000516_GR.
KEGG	mtc:MT2971. mtu:Rv2903c.
TIGR	MT2971.
Organism-specific databases
TubercuList	Rv2903c.
Phylogenomic databases
HOGENOM	HBG596607.
OMA	QTVECCD.
Enzyme and pathway databases
BRENDA	3.4.21.89. 809.
Family and domain databases
InterPro	IPR000223. Pept_S26A_signal_pept_1. IPR019758. Pept_S26A_signal_pept_1_CS. IPR019756. Pept_S26A_signal_pept_1_Ser-AS. IPR019759. Peptidase_S24_S26_cons-reg. IPR015927. Peptidase_S24_S26A/B/C. IPR011056. Peptidase_S24_S26A/B/C_b-rbn. [Graphical view]
Gene3D	G3DSA:2.10.109.10. Pept_S24_S26_C. 1 hit.
Pfam	PF00717. Peptidase_S24. 1 hit. [Graphical view]
PRINTS	PR00727. LEADERPTASE.
TIGRFAMs	TIGR02227. sigpep_I_bact. 1 hit.
PROSITE	PS00501. SPASE_I_1. 1 hit. PS00760. SPASE_I_2. False negative. PS00761. SPASE_I_3. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

LEP_MYCTU

Accession

Primary (citable) accession number: Q10789

Entry history

Integrated into UniProtKB/Swiss-Prot:	October 1, 1996
Last sequence update:	October 1, 1996
Last modified:	February 9, 2010
This is version 76 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)