Reviewed, UniProtKB/Swiss-Prot Q50441 (AHPD_MYCS2)

Names and origin

Protein names

Recommended name:
    Alkyl hydroperoxide reductase ahpD
    EC=1.11.1.15
Alternative name(s):
    Alkylhydroperoxidase ahpD

Gene names

Name:	ahpD
Ordered Locus Names:	MSMEG_4890

Organism

Mycobacterium smegmatis (strain ATCC 700084 / mc(2)155) [Complete proteome] [HAMAP]

Taxonomic identifier

246196 [NCBI]

Taxonomic lineage

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

Protein attributes

Sequence length	177 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	Antioxidant protein with alkyl hydroperoxidase activity. Required for the reduction of the ahpC active site cysteine residues and for the regeneration of the ahpC enzyme activity By similarity.
Catalytic activity	2 R'-SH + ROOH = R'-S-S-R' + H2O + ROH. HAMAP MF_01676
Subunit structure	Homotrimer By similarity.
Sequence similarities	Belongs to the ahpD family.

Ontologies

Keywords
Domain	Redox-active center
Molecular function	Antioxidant Oxidoreductase Peroxidase
PTM	Disulfide bond
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	oxidation reduction Inferred from electronic annotation. Source: UniProtKB-KW
Molecular function	alkyl hydroperoxide reductase activity Inferred from electronic annotation. Source: HAMAP peroxiredoxin activity Inferred from electronic annotation. Source: EC
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 177	177	Alkyl hydroperoxide reductase ahpD HAMAP MF_01676		PRO_0000064506
Sites
	Active site	130	1	Proton donor By similarity
	Active site	133	1	Cysteine sulfenic acid (-SOH) intermediate By similarity
Amino acid modifications
	Disulfide bond	130 ↔ 133		Alternate By similarity
	Disulfide bond	133		Interchain (with ahpC); in linked form By similarity
Experimental info
	Sequence conflict	28 – 30	3	Missing in AAC44140. Ref.2

Sequences

	Sequence		Length	Mass (Da)
	Q50441-1 [UniParc]. Last modified July 10, 2007. Version 2. Checksum: BFDA644673FA4932	FASTA	177	18,837
	10 20 30 40 50 60 MSIDNIKSAL PEYAKDLKLN LGSIANTTEL TEQQLWGALV ATAAATKNAR LLREISEDAL 70 80 90 100 110 120 DILSEEAYNA ALGAAAIMGM NNVFYRTKGQ LDGKYDDLRA GLRMNIIGNP GVAKEDFELW 130 140 150 160 170 SLAVSAINGC GHCLAAHEKT LRDADVARTT IFEAIRLASI VSGVAQALLT ADTLAAV

References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	Fleischmann R.D., Dodson R.J., Haft D.H., Merkel J.S., Nelson W.C., Fraser C.M. Submitted (OCT-2006) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
[2]	"Oxidative stress response and its role in sensitivity to isoniazid in mycobacteria: characterization and inducibility of ahpC by peroxides in Mycobacterium smegmatis and lack of expression in M. aurum and M. tuberculosis." Dhandayuthapani S., Zhang Y., Mudd M.H., Deretic V. J. Bacteriol. 178:3641-3649(1996) [PubMed: 8655566] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 1-55.

Cross-references

Sequence databases
EMBLGenBankDDBJ	CP000480 Genomic DNA. Translation: ABK74352.1. U43719 Genomic DNA. Translation: AAC44140.1.
RefSeq	YP_889146.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	4535695.
GenomeReviews	Gene locus MSMEG_4890 in contig CP000480_GR.
KEGG	msm:MSMEG_4890.
TIGR	MSMEG_4890.
Phylogenomic databases
OMA	Q50441. MAMNNVY.
Family and domain databases
HAMAP	MF_01676. [Tree]
InterPro	IPR004674. AhpD. IPR004675. AhpD_core. IPR003779. CMD. [Graphical view]
Pfam	PF02627. CMD. 1 hit. [Graphical view]
TIGRFAMs	TIGR00777. ahpD. 1 hit. TIGR00778. ahpD_dom. 1 hit.
ProtoNet	Search...

Entry information

Entry name

AHPD_MYCS2

Accession

Primary (citable) accession number: Q50441
Secondary accession number(s): A0R1V8

Entry history

Integrated into UniProtKB/Swiss-Prot:	May 30, 2000
Last sequence update:	July 10, 2007
Last modified:	June 16, 2009
This is version 35 of the entry and version 2 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

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