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Entry version 47 (07 Apr 2021)
Sequence version 1 (16 Apr 2014)
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Protein

Enoyl-[acyl-carrier-protein] reductase [NADH]

Gene

inhA

Organism
Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh)
Status
Reviewed-Annotation score:

Annotation score:4 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Protein inferred from homologyi <p>This indicates the type of evidence that supports the existence of the protein. Note that the 'protein existence' evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Enoyl-ACP reductase of the type II fatty acid syntase (FAS-II) system, which is involved in the biosynthesis of mycolic acids, a major component of mycobacterial cell walls. Catalyzes the NADH-dependent reduction of the double bond of 2-trans-enoyl-[acyl-carrier protein], an essential step in the fatty acid elongation cycle of the FAS-II pathway. Shows preference for long-chain fatty acyl thioester substrates (>C16), and can also use 2-trans-enoyl-CoAs as alternative substrates. The mycobacterial FAS-II system utilizes the products of the FAS-I system as primers to extend fatty acyl chain lengths up to C56, forming the meromycolate chain that serves as the precursor for final mycolic acids.

By similarity

Is the primary target of the first-line antitubercular drug isoniazid (INH) and of the second-line drug ethionamide (ETH). Overexpressed inhA confers INH and ETH resistance to M.tuberculosis (PubMed:12406221).

The mechanism of isoniazid action against InhA is covalent attachment of the activated form of the drug to the nicotinamide ring of NAD and binding of the INH-NAD adduct to the active site of InhA. Similarly, the ETH-NAD adduct binds InhA (By similarity).

By similarity1 Publication

Miscellaneous

Many isoniazid- and ethionamide-resistant clinical isolates contain mutations within the inhA locus. Resistance to isoniazid and ethionamide can be conferred by the single substitution of alanine for serine 94; this drug resistance seems to be directly related to a perturbation in the hydrogen-bonding network that decreases the binding of NADH and the INH-NAD adduct.By similarity

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes regulatory mechanisms for enzymes, transporters or microbial transcription factors, and reports the components which regulate (by activation or inhibition) the reaction.<p><a href='/help/activity_regulation' target='_top'>More...</a></p>Activity regulationi

InhA activity is controlled via phosphorylation: phosphorylation on Thr-266 decreases InhA activity (5-fold reduction) and likely negatively regulates biosynthesis of mycolic acids and growth of the bacterium. The antitubercular pro-drug isoniazid (INH) is oxidatively activated by the catalase-peroxidase KatG and then covalently binds NAD to form an adduct that inhibits the activity of InhA. The inhibitory adduct is the isonicotinic-acyl-NADH where the isonicotinic-acyl group replaces the 4S (and not the 4R) hydrogen of NADH. Similarly, the antitubercular pro-drugs ethionamide (ETH) and prothionamide (PTH) are activated by the flavoprotein monooxygenase EthA, and forms an adduct with NAD (ETH-NAD and PTH-NAD, respectively) that is a tight-binding inhibitor of InhA. Is inhibited by triclosan and derivatives, pyrazole derivative Genz-8575, indole-5-amide Genz-10850, alkyl diphenyl/diaryl ethers, pyrrolidine carboxamides, arylamides, pyridomycin, methyl-thiazoles, 4-hydroxy-2-pyridones, and N-benzyl-4-((heteroaryl)methyl)benzamides. Pyridomycin shows a unique mode of InhA inhibition by simultaneously blocking parts of the NADH and the lipid substrate-binding pocket of InhA. Is also inhibited by thiadiazole compounds, that have very attractive antitubercular properties.By similarity

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">'Function'</a> section describes the metabolic pathway(s) associated with a protein.<p><a href='/help/pathway' target='_top'>More...</a></p>Pathwayi: mycolic acid biosynthesis

This protein is involved in the pathway mycolic acid biosynthesis, which is part of Lipid metabolism.By similarity
View all proteins of this organism that are known to be involved in the pathway mycolic acid biosynthesis and in Lipid metabolism.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection describes interesting single amino acid sites on the sequence that are not defined in any other subsection. This subsection can be displayed in different sections ('Function', 'PTM / Processing', 'Pathology and Biotech') according to its content.<p><a href='/help/site' target='_top'>More...</a></p>Sitei149May act as an intermediate that passes the hydride ion from NADH to the substrateBy similarity1
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the interaction between a single amino acid and another chemical entity. Priority is given to the annotation of physiological ligands.<p><a href='/help/binding' target='_top'>More...</a></p>Binding sitei158SubstrateBy similarity1
Sitei158Transition state stabilizerBy similarity1
Binding sitei165NADBy similarity1
Binding sitei194NAD; via amide nitrogen and carbonyl oxygenBy similarity1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes a region in the protein which binds nucleotide phosphates. It always involves more than one amino acid and includes all residues involved in nucleotide-binding.<p><a href='/help/np_bind' target='_top'>More...</a></p>Nucleotide bindingi20 – 21NADBy similarity2
Nucleotide bindingi64 – 65NADBy similarity2
Nucleotide bindingi95 – 96NADBy similarity2

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionOxidoreductase
Biological processAntibiotic resistance, Fatty acid biosynthesis, Fatty acid metabolism, Lipid biosynthesis, Lipid metabolism
LigandNAD

Enzyme and pathway databases

UniPathway: a resource for the exploration and annotation of metabolic pathways

More...
UniPathwayi
UPA00915

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Enoyl-[acyl-carrier-protein] reductase [NADH]By similarity (EC:1.3.1.9By similarity)
Short name:
ENRBy similarity
Short name:
Enoyl-ACP reductaseBy similarity
Alternative name(s):
FAS-II enoyl-ACP reductaseBy similarity
NADH-dependent 2-trans-enoyl-ACP reductaseBy similarity
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: 'Name', 'Synonyms', 'Ordered locus names' and 'ORF names'.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:inhAImported
Ordered Locus Names:MT1531
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiMycobacterium tuberculosis (strain CDC 1551 / Oshkosh)
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the 'taxonomic identifier' or 'taxid'.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri83331 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiBacteriaActinobacteriaCorynebacterialesMycobacteriaceaeMycobacteriumMycobacterium tuberculosis complex
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000001020 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes%5Fmanual">proteome</a> can consist of several components.<br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the mature protein following processing or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00004283181 – 269Enoyl-[acyl-carrier-protein] reductase [NADH]Add BLAST269

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section specifies the position and type of each modified residue excluding <a href="http://www.uniprot.org/manual/lipid">lipids</a>, <a href="http://www.uniprot.org/manual/carbohyd">glycans</a> and <a href="http://www.uniprot.org/manual/crosslnk">protein cross-links</a>.<p><a href='/help/mod_res' target='_top'>More...</a></p>Modified residuei266PhosphothreonineBy similarity1

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi

Is phosphorylated on Thr-266 in vivo. In vitro, can be phosphorylated by multiple Ser/Thr protein kinases (STPK) such as PknA, PknB, PknE, PknH and PknL. Phosphorylation decreases enzymatic activity.By similarity

Keywords - PTMi

Phosphoprotein

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction%5Fsection">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function%5Fsection">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Homodimer. Homotetramer.

By similarity

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...
SMRi
P9WGR0

Database of comparative protein structure models

More...
ModBasei
Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

<p>This subsection of the 'Family and domains' section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Phylogenomic databases

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_010194_10_1_11

Family and domain databases

Conserved Domains Database

More...
CDDi
cd05372, ENR_SDR, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR014358, Enoyl-ACP_Rdtase_NADH
IPR036291, NAD(P)-bd_dom_sf

The PANTHER Classification System

More...
PANTHERi
PTHR43159:SF2, PTHR43159:SF2, 1 hit

PIRSF; a whole-protein classification database

More...
PIRSFi
PIRSF000094, Enoyl-ACP_rdct, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF51735, SSF51735, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence%5Flength">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

P9WGR0-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MTGLLDGKRI LVSGIITDSS IAFHIARVAQ EQGAQLVLTG FDRLRLIQRI
60 70 80 90 100
TDRLPAKAPL LELDVQNEEH LASLAGRVTE AIGAGNKLDG VVHSIGFMPQ
110 120 130 140 150
TGMGINPFFD APYADVSKGI HISAYSYASM AKALLPIMNP GGSIVGMDFD
160 170 180 190 200
PSRAMPAYNW MTVAKSALES VNRFVAREAG KYGVRSNLVA AGPIRTLAMS
210 220 230 240 250
AIVGGALGEE AGAQIQLLEE GWDQRAPIGW NMKDATPVAK TVCALLSDWL
260
PATTGDIIYA DGGAHTQLL
Length:269
Mass (Da):28,528
Last modified:April 16, 2014 - v1
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:iF161D6D6A631CA08
GO

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
AE000516 Genomic DNA Translation: AAK45796.1

Protein sequence database of the Protein Information Resource

More...
PIRi
G70710

NCBI Reference Sequences

More...
RefSeqi
WP_003407553.1, NZ_KK341227.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
AAK45796; AAK45796; MT1531

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
45425463

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
mtc:MT1531

Pathosystems Resource Integration Center (PATRIC)

More...
PATRICi
fig|83331.31.peg.1646

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AE000516 Genomic DNA Translation: AAK45796.1
PIRiG70710
RefSeqiWP_003407553.1, NZ_KK341227.1

3D structure databases

SMRiP9WGR0
ModBaseiSearch...

Genome annotation databases

EnsemblBacteriaiAAK45796; AAK45796; MT1531
GeneIDi45425463
KEGGimtc:MT1531
PATRICifig|83331.31.peg.1646

Phylogenomic databases

HOGENOMiCLU_010194_10_1_11

Enzyme and pathway databases

UniPathwayiUPA00915

Family and domain databases

CDDicd05372, ENR_SDR, 1 hit
InterProiView protein in InterPro
IPR014358, Enoyl-ACP_Rdtase_NADH
IPR036291, NAD(P)-bd_dom_sf
PANTHERiPTHR43159:SF2, PTHR43159:SF2, 1 hit
PIRSFiPIRSF000094, Enoyl-ACP_rdct, 1 hit
SUPFAMiSSF51735, SSF51735, 1 hit

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the 'Entry information' section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiINHA_MYCTO
<p>This subsection of the 'Entry information' section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called 'Primary (citable) accession number'.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: P9WGR0
Secondary accession number(s): F2GEM2
, P0A5Y6, P46533, Q540M9
<p>This subsection of the 'Entry information' section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification ('Last modified'). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: April 16, 2014
Last sequence update: April 16, 2014
Last modified: April 7, 2021
This is version 47 of the entry and version 1 of the sequence. See complete history.
<p>This subsection of the 'Entry information' section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

<p>This section contains any relevant information that doesn't fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families
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