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Entry version 155 (12 Aug 2020)
Sequence version 5 (16 Nov 2011)
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Protein

Maltodextrin glucosidase

Gene

malZ

Organism
Escherichia coli (strain K12)
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>
-Experimental evidence at protein leveli <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

May play a role in regulating the intracellular level of maltotriose. Cleaves glucose from the reducing end of maltotriose and longer maltodextrins with a chain length of up to 7 glucose units.

<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

  • Hydrolysis of terminal, non-reducing (1->4)-linked alpha-D-glucose residues with release of alpha-D-glucose. EC:3.2.1.20

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section is used for enzymes and indicates the residues directly involved in catalysis.<p><a href='/help/act_site' target='_top'>More...</a></p>Active sitei336NucleophileBy similarity1
Active sitei373Proton donorBy similarity1
<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>Sitei448Transition state stabilizerBy similarity1

<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

  • alpha-1,4-glucosidase activity Source: EcoCyc
  • maltose alpha-glucosidase activity Source: UniProtKB-EC

GO - Biological processi

  • alpha-glucan catabolic process Source: EcoCyc
  • cellular oligosaccharide catabolic process Source: EcoCyc

<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 functionGlycosidase, Hydrolase
Biological processMaltose metabolism

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
EcoCyc:MALTODEXGLUCOSID-MONOMER
ECOL316407:JW0393-MONOMER
MetaCyc:MALTODEXGLUCOSID-MONOMER

BRENDA Comprehensive Enzyme Information System

More...
BRENDAi
3.2.1.20, 2026

Protein family/group databases

Carbohydrate-Active enZymes

More...
CAZyi
CBM34, Carbohydrate-Binding Module Family 34
GH13, Glycoside Hydrolase Family 13

<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:
Maltodextrin glucosidase (EC:3.2.1.20)
Alternative name(s):
Alpha-glucosidase
<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:malZ
Ordered Locus Names:b0403, JW0393
<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>OrganismiEscherichia coli (strain K12)
<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 identifieri83333 [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 lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesEnterobacteriaceaeEscherichia
<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
  • UP000000318 <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
  • UP000000625 Componenti: Chromosome

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

GO - Cellular componenti

Keywords - Cellular componenti

Cytoplasm

<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_00000543341 – 604Maltodextrin glucosidaseAdd BLAST604

Proteomic databases

jPOST - Japan Proteome Standard Repository/Database

More...
jPOSTi
P21517

PaxDb, a database of protein abundance averages across all three domains of life

More...
PaxDbi
P21517

PRoteomics IDEntifications database

More...
PRIDEi
P21517

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

<p>This subsection of the 'Expression' section reports the experimentally proven effects of inducers and repressors (usually chemical compounds or environmental factors) on the level of protein (or mRNA) expression (up-regulation, down-regulation, constitutive expression).<p><a href='/help/induction' target='_top'>More...</a></p>Inductioni

Under positive control of MalT.

<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

Monomer.

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

More...
BioGRIDi
4263268, 9 interactors

Database of interacting proteins

More...
DIPi
DIP-10152N

Protein interaction database and analysis system

More...
IntActi
P21517, 8 interactors

Molecular INTeraction database

More...
MINTi
P21517

STRING: functional protein association networks

More...
STRINGi
511145.b0403

<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
P21517

Database of comparative protein structure models

More...
ModBasei
Search...

Protein Data Bank in Europe - Knowledge Base

More...
PDBe-KBi
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

Belongs to the glycosyl hydrolase 13 family.Curated

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
COG0366, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_006462_6_4_6

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
P21517

KEGG Orthology (KO)

More...
KOi
K01187

Family and domain databases

Conserved Domains Database

More...
CDDi
cd02857, E_set_CDase_PDE_N, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
2.60.40.1180, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR006047, Glyco_hydro_13_cat_dom
IPR004185, Glyco_hydro_13_lg-like_dom
IPR013780, Glyco_hydro_b
IPR017853, Glycoside_hydrolase_SF
IPR014756, Ig_E-set
IPR017069, MalZ

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00128, Alpha-amylase, 1 hit
PF02903, Alpha-amylase_N, 1 hit

PIRSF; a whole-protein classification database

More...
PIRSFi
PIRSF036918, Maltodextrin_glucosidase, 1 hit

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00642, Aamy, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF51445, SSF51445, 1 hit
SSF81296, SSF81296, 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.

P21517-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MLNAWHLPVP PFVKQSKDQL LITLWLTGED PPQRIMLRTE HDNEEMSVPM
60 70 80 90 100
HKQRSQPQPG VTAWRAAIDL SSGQPRRRYS FKLLWHDRQR WFTPQGFSRM
110 120 130 140 150
PPARLEQFAV DVPDIGPQWA ADQIFYQIFP DRFARSLPRE AEQDHVYYHH
160 170 180 190 200
AAGQEIILRD WDEPVTAQAG GSTFYGGDLD GISEKLPYLK KLGVTALYLN
210 220 230 240 250
PVFKAPSVHK YDTEDYRHVD PQFGGDGALL RLRHNTQQLG MRLVLDGVFN
260 270 280 290 300
HSGDSHAWFD RHNRGTGGAC HNPESPWRDW YSFSDDGTAL DWLGYASLPK
310 320 330 340 350
LDYQSESLVN EIYRGEDSIV RHWLKAPWNM DGWRLDVVHM LGEAGGARNN
360 370 380 390 400
MQHVAGITEA AKETQPEAYI VGEHFGDARQ WLQADVEDAA MNYRGFTFPL
410 420 430 440 450
WGFLANTDIS YDPQQIDAQT CMAWMDNYRA GLSHQQQLRM FNQLDSHDTA
460 470 480 490 500
RFKTLLGRDI ARLPLAVVWL FTWPGVPCIY YGDEVGLDGK NDPFCRKPFP
510 520 530 540 550
WQVEKQDTAL FALYQRMIAL RKKSQALRHG GCQVLYAEDN VVVFVRVLNQ
560 570 580 590 600
QRVLVAINRG EACEVVLPAS PFLNAVQWQC KEGHGQLTDG ILALPAISAT

VWMN
Length:604
Mass (Da):69,041
Last modified:November 16, 2011 - v5
<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:iB5A14754D7A42CCB
GO

<p>This subsection of the 'Sequence' section reports difference(s) between the protein sequence shown in the UniProtKB entry and other available protein sequences derived from the same gene.<p><a href='/help/sequence_caution' target='_top'>More...</a></p>Sequence cautioni

The sequence AAB40159 differs from that shown. Reason: Erroneous initiation. Extended N-terminus.Curated
The sequence BAE76183 differs from that shown. Reason: Erroneous initiation. Extended N-terminus.Curated

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.<p><a href='/help/conflict' target='_top'>More...</a></p>Sequence conflicti301L → M in CAA42498 (PubMed:1918057).Curated1
Sequence conflicti445D → E in CAA42498 (PubMed:1918057).Curated1
Sequence conflicti546R → S in CAA42498 (PubMed:1918057).Curated1

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

More...
GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
X59839 Genomic DNA Translation: CAA42498.1
U82664 Genomic DNA Translation: AAB40159.1 Different initiation.
U00096 Genomic DNA Translation: AAC73506.2
AP009048 Genomic DNA Translation: BAE76183.1 Different initiation.
M37702 Genomic DNA Translation: AAA16112.1

Protein sequence database of the Protein Information Resource

More...
PIRi
C64769

NCBI Reference Sequences

More...
RefSeqi
NP_414937.2, NC_000913.3

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
AAC73506; AAC73506; b0403
BAE76183; BAE76183; BAE76183

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
949131

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ecj:JW0393
eco:b0403

Pathosystems Resource Integration Center (PATRIC)

More...
PATRICi
fig|511145.12.peg.419

<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
X59839 Genomic DNA Translation: CAA42498.1
U82664 Genomic DNA Translation: AAB40159.1 Different initiation.
U00096 Genomic DNA Translation: AAC73506.2
AP009048 Genomic DNA Translation: BAE76183.1 Different initiation.
M37702 Genomic DNA Translation: AAA16112.1
PIRiC64769
RefSeqiNP_414937.2, NC_000913.3

3D structure databases

Select the link destinations:

Protein Data Bank Europe

More...
PDBei

Protein Data Bank RCSB

More...
RCSB PDBi

Protein Data Bank Japan

More...
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
5BN7X-ray3.70A1-604[»]
SMRiP21517
ModBaseiSearch...
PDBe-KBiSearch...

Protein-protein interaction databases

BioGRIDi4263268, 9 interactors
DIPiDIP-10152N
IntActiP21517, 8 interactors
MINTiP21517
STRINGi511145.b0403

Protein family/group databases

CAZyiCBM34, Carbohydrate-Binding Module Family 34
GH13, Glycoside Hydrolase Family 13

Proteomic databases

jPOSTiP21517
PaxDbiP21517
PRIDEiP21517

Genome annotation databases

EnsemblBacteriaiAAC73506; AAC73506; b0403
BAE76183; BAE76183; BAE76183
GeneIDi949131
KEGGiecj:JW0393
eco:b0403
PATRICifig|511145.12.peg.419

Organism-specific databases

EchoBASE - an integrated post-genomic database for E. coli

More...
EchoBASEi
EB0560

Phylogenomic databases

eggNOGiCOG0366, Bacteria
HOGENOMiCLU_006462_6_4_6
InParanoidiP21517
KOiK01187

Enzyme and pathway databases

BioCyciEcoCyc:MALTODEXGLUCOSID-MONOMER
ECOL316407:JW0393-MONOMER
MetaCyc:MALTODEXGLUCOSID-MONOMER
BRENDAi3.2.1.20, 2026

Miscellaneous databases

Protein Ontology

More...
PROi
PR:P21517

Family and domain databases

CDDicd02857, E_set_CDase_PDE_N, 1 hit
Gene3Di2.60.40.1180, 1 hit
InterProiView protein in InterPro
IPR006047, Glyco_hydro_13_cat_dom
IPR004185, Glyco_hydro_13_lg-like_dom
IPR013780, Glyco_hydro_b
IPR017853, Glycoside_hydrolase_SF
IPR014756, Ig_E-set
IPR017069, MalZ
PfamiView protein in Pfam
PF00128, Alpha-amylase, 1 hit
PF02903, Alpha-amylase_N, 1 hit
PIRSFiPIRSF036918, Maltodextrin_glucosidase, 1 hit
SMARTiView protein in SMART
SM00642, Aamy, 1 hit
SUPFAMiSSF51445, SSF51445, 1 hit
SSF81296, SSF81296, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

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 nameiMALZ_ECOLI
<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: P21517
Secondary accession number(s): Q2MC23
<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: May 1, 1991
Last sequence update: November 16, 2011
Last modified: August 12, 2020
This is version 155 of the entry and version 5 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

Keywords - Technical termi

3D-structure, Reference proteome

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. SIMILARITY comments
    Index of protein domains and families
  3. Glycosyl hydrolases
    Classification of glycosyl hydrolase families and list of entries
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