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Protein

Maltose O-acetyltransferase

Gene

maa

Organism
Escherichia coli (strain K12)
Status
Reviewed-Annotation score: -Experimental evidence at protein leveli

Functioni

Acetylates maltose and other sugars.

Catalytic activityi

Acetyl-CoA + maltose = CoA + acetyl-maltose.

Kineticsi

Acetylates glucose, maltose, mannose, galactose, and fructose with a decreasing relative rate of 1, 0.55, 0.20, 0.07, 0.04.
  1. KM=62 mM for glucose
  2. KM=90 mM for maltose
  1. Vmax=0.20 mmol/min/mg enzyme with glucose as substrate
  2. Vmax=0.11 mmol/min/mg enzyme with maltose as substrate

GO - Molecular functioni

  • identical protein binding Source: EcoCyc
  • maltose O-acetyltransferase activity Source: EcoCyc

GO - Biological processi

  • protein homotrimerization Source: EcoCyc

Keywordsi

Molecular functionTransferase

Enzyme and pathway databases

BioCyciEcoCyc:MALTACETYLTRAN-MONOMER
MetaCyc:MALTACETYLTRAN-MONOMER
BRENDAi2.3.1.79 2026

Names & Taxonomyi

Protein namesi
Recommended name:
Maltose O-acetyltransferase (EC:2.3.1.79)
Alternative name(s):
Maltose transacetylase
Gene namesi
Name:maa
Synonyms:ylaD
Ordered Locus Names:b0459, JW0448
OrganismiEscherichia coli (strain K12)
Taxonomic identifieri83333 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesEnterobacteriaceaeEscherichia
Proteomesi
  • UP000000318 Componenti: Chromosome
  • UP000000625 Componenti: Chromosome

Organism-specific databases

EcoGeneiEG14239 maa

Subcellular locationi

GO - Cellular componenti

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Initiator methionineiRemoved1 Publication
ChainiPRO_00000687292 – 183Maltose O-acetyltransferaseAdd BLAST182

Proteomic databases

PaxDbiP77791
PRIDEiP77791

2D gel databases

SWISS-2DPAGEiP77791

Interactioni

Subunit structurei

Homodimer.

GO - Molecular functioni

  • identical protein binding Source: EcoCyc

Protein-protein interaction databases

BioGridi4261202, 4 interactors
DIPiDIP-10140N
IntActiP77791, 16 interactors
STRINGi316385.ECDH10B_0415

Structurei

Secondary structure

1183
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Helixi4 – 9Combined sources6
Helixi19 – 37Combined sources19
Helixi43 – 53Combined sources11
Beta strandi54 – 56Combined sources3
Beta strandi58 – 62Combined sources5
Beta strandi66 – 71Combined sources6
Beta strandi74 – 76Combined sources3
Beta strandi78 – 82Combined sources5
Beta strandi84 – 89Combined sources6
Beta strandi94 – 96Combined sources3
Beta strandi107 – 109Combined sources3
Helixi117 – 120Combined sources4
Turni121 – 123Combined sources3
Beta strandi125 – 127Combined sources3
Beta strandi130 – 132Combined sources3
Beta strandi168 – 173Combined sources6
Turni174 – 177Combined sources4
Beta strandi178 – 182Combined sources5

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1OCXX-ray2.15A/B/C2-183[»]
ProteinModelPortaliP77791
SMRiP77791
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiP77791

Family & Domainsi

Sequence similaritiesi

Keywords - Domaini

Repeat

Phylogenomic databases

eggNOGiENOG4108UW5 Bacteria
COG0110 LUCA
HOGENOMiHOG000049435
InParanoidiP77791
KOiK00661
OMAiMNFNCVI
PhylomeDBiP77791

Family and domain databases

InterProiView protein in InterPro
IPR001451 Hexapep
IPR018357 Hexapep_transf_CS
IPR024688 Mac_dom
IPR011004 Trimer_LpxA-like_sf
PfamiView protein in Pfam
PF14602 Hexapep_2, 2 hits
PF12464 Mac, 1 hit
SMARTiView protein in SMART
SM01266 Mac, 1 hit
SUPFAMiSSF51161 SSF51161, 1 hit
PROSITEiView protein in PROSITE
PS00101 HEXAPEP_TRANSFERASES, 1 hit

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

P77791-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MSTEKEKMIA GELYRSADET LSRDRLRARQ LIHRYNHSLA EEHTLRQQIL
60 70 80 90 100
ADLFGQVTEA YIEPTFRCDY GYNIFLGNNF FANFDCVMLD VCPIRIGDNC
110 120 130 140 150
MLAPGVHIYT ATHPIDPVAR NSGAELGKPV TIGNNVWIGG RAVINPGVTI
160 170 180
GDNVVVASGA VVTKDVPDNV VVGGNPARII KKL
Length:183
Mass (Da):20,096
Last modified:January 23, 2007 - v3
Checksum:i3E4C7A4D68AA49C4
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AJ223173 Genomic DNA Translation: CAA11147.1
U82664 Genomic DNA Translation: AAB40214.1
U00096 Genomic DNA Translation: AAC73561.1
AP009048 Genomic DNA Translation: BAE76238.1
PIRiB64776
RefSeqiNP_414992.1, NC_000913.3
WP_000102564.1, NZ_LN832404.1

Genome annotation databases

EnsemblBacteriaiAAC73561; AAC73561; b0459
BAE76238; BAE76238; BAE76238
GeneIDi945096
KEGGiecj:JW0448
eco:b0459
PATRICifig|1411691.4.peg.1817

Similar proteinsi

Entry informationi

Entry nameiMAA_ECOLI
AccessioniPrimary (citable) accession number: P77791
Secondary accession number(s): Q2MBW8
Entry historyiIntegrated into UniProtKB/Swiss-Prot: November 1, 1997
Last sequence update: January 23, 2007
Last modified: March 28, 2018
This is version 134 of the entry and version 3 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure, Complete proteome, Direct protein sequencing, Reference proteome
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Main funding by: National Institutes of Health