Reviewed, UniProtKB/Swiss-Prot P59662 (LEP_STRR6)

Names and origin

Protein names

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

Gene names

Name:	lepB
Synonyms:	spi
Ordered Locus Names:	spr0364

Organism

Streptococcus pneumoniae (strain ATCC BAA-255 / R6) [Complete proteome] [HAMAP]

Taxonomic identifier

171101 [NCBI]

Taxonomic lineage

Bacteria › Firmicutes › Lactobacillales › Streptococcaceae › Streptococcus

Protein attributes

Sequence length	204 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
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 Potential.
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-KW plasma membrane Inferred from electronic annotation. Source: UniProtKB-SubCell
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 – 204	204	Signal peptidase I		PRO_0000109534
Regions
	Topological domain	1 – 10	10	Cytoplasmic Potential
	Transmembrane	11 – 30	20	Potential
	Topological domain	31 – 204	174	Extracellular Potential
Sites
	Active site	38	1	By similarity
	Active site	76	1	By similarity

Sequences

	Sequence		Length	Mass (Da)
	P59662-1 [UniParc]. Last modified April 30, 2003. Version 1. Checksum: 3D56798C79C2C3CA	FASTA	204	23,498
	10 20 30 40 50 60 MNLFKNFLKE WGLFLLILSL LALSRIFFWS NVRVEGHSMD PTLADGEILF VVKHLPIDRF 70 80 90 100 110 120 DIVVAHEEDG NKDIVKRVIG MPGDTIRYEN DKLYINDKET DEPYLADYIK RFKDDKLQST 130 140 150 160 170 180 YSGKGFEGNK GTFFRSIAQK AQAFTVDVNY NTNFSFTVPE GEYLLLGDDR LVSSDSRHVG 190 200 TFKAKDITGE AKFRFWPITR IGTF

References

[1]

"Genome of the bacterium Streptococcus pneumoniae strain R6." Hoskins J., Alborn W.E. Jr., Arnold J., Blaszczak L.C., Burgett S., DeHoff B.S., Estrem S.T., Fritz L., Fu D.-J., Fuller W., Geringer C., Gilmour R., Glass J.S., Khoja H., Kraft A.R., Lagace R.E., LeBlanc D.J., Lee L.N. , Lefkowitz E.J., Lu J., Matsushima P., McAhren S.M., McHenney M., McLeaster K., Mundy C.W., Nicas T.I., Norris F.H., O'Gara M., Peery R.B., Robertson G.T., Rockey P., Sun P.-M., Winkler M.E., Yang Y., Young-Bellido M., Zhao G., Zook C.A., Baltz R.H., Jaskunas S.R., Rosteck P.R. Jr., Skatrud P.L., Glass J.I. J. Bacteriol. 183:5709-5717(2001) [PubMed: 11544234] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	AE007317 Genomic DNA. Translation: AAK99168.1.
RefSeq	NP_357958.1.
3D structure databases
HSSP	HSSP built from PDB template 1B12 based on UniProtKB P00803.
ModBase	Search...
Genome annotation databases
GeneID	934640.
GenomeReviews	Gene locus spr0364 in contig AE007317_GR.
KEGG	spr:spr0364.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	P59662.
OMA	P59662. DEYLAAF.
Enzyme and pathway databases
BioCyc	SPNE171101:SPR0364-MON.
Family and domain databases
InterPro	IPR000223. Pept_S26A_signal_pept_1. IPR019758. Pept_S26A_signal_pept_1_CS. IPR019757. Pept_S26A_signal_pept_1_Lys-AS. IPR019756. Pept_S26A_signal_pept_1_Ser-AS. IPR019759. Peptidase_S24_S26_cons-reg. 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. 1 hit. PS00761. SPASE_I_3. False negative. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

LEP_STRR6

Accession

Primary (citable) accession number: P59662

Entry history

Integrated into UniProtKB/Swiss-Prot:	April 30, 2003
Last sequence update:	April 30, 2003
Last modified:	June 16, 2009
This is version 44 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)