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Protein

4-hydroxy-tetrahydrodipicolinate reductase

Gene

dapB

Organism
Mycobacterium smegmatis (strain ATCC 700084 / mc(2)155)
Status
Reviewed-Annotation score: -Experimental evidence at protein leveli

Functioni

Catalyzes the conversion of 4-hydroxy-tetrahydrodipicolinate (HTPA) to tetrahydrodipicolinate.UniRule annotation

Caution

Was originally thought to be a dihydrodipicolinate reductase (DHDPR), catalyzing the conversion of dihydrodipicolinate to tetrahydrodipicolinate. However, it was shown in E.coli that the substrate of the enzymatic reaction is not dihydrodipicolinate (DHDP) but in fact (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinic acid (HTPA), the product released by the DapA-catalyzed reaction.Curated

Catalytic activityi

(S)-2,3,4,5-tetrahydropyridine-2,6-dicarboxylate + NAD(P)+ + H2O = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + NAD(P)H.UniRule annotation

Pathwayi: L-lysine biosynthesis via DAP pathway

This protein is involved in step 4 of the subpathway that synthesizes (S)-tetrahydrodipicolinate from L-aspartate.UniRule annotation
Proteins known to be involved in the 4 steps of the subpathway in this organism are:
  1. Aspartokinase (MSMEG_6257), Aspartokinase (ask)
  2. Aspartate-semialdehyde dehydrogenase (asd), Aspartate-semialdehyde dehydrogenase (asd)
  3. 4-hydroxy-tetrahydrodipicolinate synthase (dapA), 4-hydroxy-tetrahydrodipicolinate synthase (dapA)
  4. 4-hydroxy-tetrahydrodipicolinate reductase (dapB)
This subpathway is part of the pathway L-lysine biosynthesis via DAP pathway, which is itself part of Amino-acid biosynthesis.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes (S)-tetrahydrodipicolinate from L-aspartate, the pathway L-lysine biosynthesis via DAP pathway and in Amino-acid biosynthesis.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Active sitei132Proton donor/acceptorUniRule annotation1
Binding sitei133SubstrateUniRule annotation1
Active sitei136Proton donorUniRule annotation1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Nucleotide bindingi7 – 12NAD(P)UniRule annotation6
Nucleotide bindingi75 – 77NAD(P)UniRule annotation3
Nucleotide bindingi102 – 105NAD(P)UniRule annotation4

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionOxidoreductase
Biological processAmino-acid biosynthesis, Diaminopimelate biosynthesis, Lysine biosynthesis
LigandNAD, NADP

Enzyme and pathway databases

UniPathwayiUPA00034; UER00018

Names & Taxonomyi

Protein namesi
Recommended name:
4-hydroxy-tetrahydrodipicolinate reductaseUniRule annotation (EC:1.17.1.8UniRule annotation)
Short name:
HTPA reductaseUniRule annotation
Gene namesi
Name:dapBUniRule annotation
Ordered Locus Names:MSMEG_2664, MSMEI_2600
OrganismiMycobacterium smegmatis (strain ATCC 700084 / mc(2)155)
Taxonomic identifieri246196 [NCBI]
Taxonomic lineageiBacteriaActinobacteriaCorynebacterialesMycobacteriaceaeMycobacteriumMycobacterium fortuitum complex
Proteomesi
  • UP000006158 Componenti: Chromosome
  • UP000000757 Componenti: Chromosome

Subcellular locationi

  • Cytoplasm UniRule annotation

GO - Cellular componenti

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_10000085971 – 2454-hydroxy-tetrahydrodipicolinate reductaseAdd BLAST245

Interactioni

Protein-protein interaction databases

STRINGi246196.MSMEG_2664

Structurei

3D structure databases

ProteinModelPortaliA0QVR3
SMRiA0QVR3
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni142 – 143Substrate bindingUniRule annotation2

Sequence similaritiesi

Belongs to the DapB family.UniRule annotation

Phylogenomic databases

eggNOGiENOG4105DUK Bacteria
COG0289 LUCA
HOGENOMiHOG000227154
KOiK00215
OMAiRESFMPG
OrthoDBiPOG091H01P6

Family and domain databases

HAMAPiMF_00102 DapB, 1 hit
InterProiView protein in InterPro
IPR022663 DapB_C
IPR000846 DapB_N
IPR022664 DapB_N_CS
IPR023940 DHDPR_bac
IPR036291 NAD(P)-bd_dom_sf
PANTHERiPTHR20836 PTHR20836, 1 hit
PfamiView protein in Pfam
PF05173 DapB_C, 1 hit
PF01113 DapB_N, 1 hit
PIRSFiPIRSF000161 DHPR, 1 hit
SUPFAMiSSF51735 SSF51735, 1 hit
TIGRFAMsiTIGR00036 dapB, 1 hit
PROSITEiView protein in PROSITE
PS01298 DAPB, 1 hit

Sequencei

Sequence statusi: Complete.

A0QVR3-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MRVGVLGARG KVGATMVAAV EAAEDLTFSA GVDAGDDLSL LTESKTEVVI
60 70 80 90 100
DFTHPDVVMD NLKFVIDNGI HAVVGTTGFT WERIEQVEAW VKAKPGASVL
110 120 130 140 150
IAPNFAIGAV LSMHFAKQAA KYFESVEIIE LHHPHKADAP SGTAARTAKL
160 170 180 190 200
IAEARKGLPP NPDATSTGLD GARGADVDGI PVHSVRLAGL VAHQEVLFGT
210 220 230 240
QGETLTIRHD SLDRTSFVPG VLLAVRKISG LQGLTVGIEP LLDLS
Length:245
Mass (Da):25,710
Last modified:January 9, 2007 - v1
Checksum:i4AAB4A4C9832612A
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000480 Genomic DNA Translation: ABK71521.1
CP001663 Genomic DNA Translation: AFP39068.1
RefSeqiWP_011728512.1, NZ_CP009494.1
YP_887001.1, NC_008596.1

Genome annotation databases

EnsemblBacteriaiABK71521; ABK71521; MSMEG_2664
AFP39068; AFP39068; MSMEI_2600
GeneIDi4535928
KEGGimsb:LJ00_13260
msg:MSMEI_2600
msm:MSMEG_2664
PATRICifig|246196.19.peg.2630

Similar proteinsi

Entry informationi

Entry nameiDAPB_MYCS2
AccessioniPrimary (citable) accession number: A0QVR3
Secondary accession number(s): I7FJY8
Entry historyiIntegrated into UniProtKB/Swiss-Prot: January 15, 2008
Last sequence update: January 9, 2007
Last modified: May 23, 2018
This is version 87 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

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