Q57350 (LEPQ_BACNA) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
Signal peptidase I P
Short name=SPase I
EC=3.4.21.89

Alternative name(s):
Leader peptidase I

Gene names

Name:	sipP
Synonyms:	sipP40

Encoded on

Plasmid pTA1040

Organism

Bacillus subtilis subsp. natto

Taxonomic identifier

86029 [NCBI]

Taxonomic lineage

Bacteria › Firmicutes › Bacillales › Bacillaceae › Bacillus

Protein attributes

Sequence length	185 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 Potential.
Sequence similarities	Belongs to the peptidase S26 family.

Ontologies

Keywords
Cellular component	Cell membrane Membrane
Domain	Transmembrane Transmembrane helix
Molecular function	Hydrolase Protease
Technical term	Plasmid
Gene Ontology (GO)
Biological process	proteolysis Inferred from electronic annotation. Source: UniProtKB-KW
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 – 185	185	Signal peptidase I P		PRO_0000109498
Regions
	Topological domain	1 – 14	14	Cytoplasmic Potential
	Transmembrane	15 – 34	20	Helical; Potential
	Topological domain	35 – 185	151	Extracellular Potential
Sites
	Active site	43	1	By similarity
	Active site	85	1	By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q57350 [UniParc]. Last modified November 1, 1996. Version 1. Checksum: D501657FEF6C7C49	FASTA	185	21,568
	10 20 30 40 50 60 MFDKEKRKKS NIIDWIKAIL IALILVFLVR TFLFEPYIVQ GESMKPTLFN SERLFVNKFV 70 80 90 100 110 120 KYTGDFKRGD IVVLNGEEKK THYVKRLIGL PGDTIEMKND NLFVNGKRFN EEYLKENKKD 130 140 150 160 170 180 AHDSDLNLTG DFGPIKVPKD KYFVMGDNRQ NSMDSRNGLG LFNKKDIVGV EELVFFPLDR IRHAK

References

[1]

"The endogenous Bacillus subtilis (natto) plasmids pTA1015 and pTA1040 contain signal peptidase-encoding genes: identification of a new structural module on cryptic plasmids." Meijer W.J.J., de Jong A., Bea G., Wisman A., Tjalsma H., Venema G., Bron S., van Dijl J.M. Mol. Microbiol. 17:621-631(1995) [PubMed: 8801417] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]. Strain: IAM 1232.

Cross-references

Sequence databases
EMBL GenBank DDBJ	U32378 Genomic DNA. Translation: AAC44409.1.
PIR	I40552.
RefSeq	NP_053777.1. NC_001764.1.
3D structure databases
ProteinModelPortal	Q57350.
ModBase	Search...
Protein family/group databases
MEROPS	S26.007.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	1115969.
Phylogenomic databases
ProtClustDB	CLSK862274.
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. 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. 2 hits.
Pfam	PF00717. Peptidase_S24. 1 hit. [Graphical view]
PRINTS	PR00727. LEADERPTASE.
SUPFAM	SSF51306. Pept_S24_S26_C. 1 hit.
TIGRFAMs	TIGR02227. Sigpep_I_bact. 1 hit.
PROSITE	PS00501. SPASE_I_1. 1 hit. PS00760. SPASE_I_2. 1 hit. PS00761. SPASE_I_3. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

LEPQ_BACNA

Accession

Primary (citable) accession number: Q57350

Entry history

Integrated into UniProtKB/Swiss-Prot:	December 15, 1998
Last sequence update:	November 1, 1996
Last modified:	November 16, 2011
This is version 76 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program