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Protein

DNA polymerase III subunit chi

Gene

holC

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

Part of the beta sliding clamp loading complex, which hydrolyzes ATP to load the beta clamp onto primed DNA to form the DNA replication pre-initiation complex (PubMed:2040637). DNA polymerase III is a complex, multichain enzyme responsible for most of the replicative synthesis in bacteria. This DNA polymerase also exhibits 3' to 5' exonuclease activity.1 Publication

<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">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>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

  • DNA replication Source: UniProtKB-KW
  • positive regulation of DNA-dependent DNA replication initiation Source: EcoliWiki
  • response to radiation 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 functionDNA-directed DNA polymerase, Nucleotidyltransferase, Transferase
Biological processDNA replication

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
EcoCyc:EG11413-MONOMER
MetaCyc:EG11413-MONOMER

<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_and_taxonomy_section">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:
DNA polymerase III subunit chi (EC:2.7.7.7)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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:holC
Ordered Locus Names:b4259, JW4216
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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_and_taxonomy_section">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_and_taxonomy_section">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_and_taxonomy_section">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_manual">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

Organism-specific databases

Escherichia coli strain K12 genome database

More...
EcoGenei
EG11413 holC

<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

  • DNA polymerase III, clamp loader chi/psi subcomplex Source: EcoliWiki

<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.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00001055171 – 147DNA polymerase III subunit chiAdd BLAST147

Proteomic databases

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

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PaxDbi
P28905

PRoteomics IDEntifications database

More...
PRIDEi
P28905

<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_section">'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_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

The DNA polymerase III holoenzyme complex contains at least 10 different subunits organized into 3 functionally essential subassemblies: the Pol III core, the beta sliding clamp processivity factor and the clamp-loading complex. The Pol III core (subunits alpha, epsilon and theta) contains the polymerase and the 3'-5' exonuclease proofreading activities (PubMed:2040637). The polymerase is tethered to the template via the dimeric beta sliding clamp processivity factor. The clamp-loading complex (also called gamma complex) assembles the beta sliding clamp onto the primed template and plays a central role in the organization and communication at the replication fork. The clamp-loading complex contains delta, delta', psi and chi, and 3 copies of either or both of two different DnaX proteins, gamma and tau. The DNA replisome complex has a single clamp loader (3 tau and 1 each of delta, delta', psi and chi subunits) which binds 3 Pol III cores (1 core on the leading strand and 2 on the lagging strand) each with a beta sliding clamp dimer. Additional proteins in the replisome are other copies of gamma, psi and chi, Ssb, DNA helicase and RNA primase (PubMed:20413500, PubMed:22157955). The clamp loader hydrolyzes ATP to assemble the beta processivity factor onto the primed template (PubMed:2040637) and plays a central role in the organization and communication at the replication fork.3 Publications

<p>This subsection of the '<a href="http://www.uniprot.org/help/interaction_section%27">Interaction</a> section provides information about binary protein-protein interactions. The data presented in this section are a quality-filtered subset of binary interactions automatically derived from the <a href="http://www.ebi.ac.uk/intact/">IntAct database</a>. It is updated on a monthly basis. Each binary interaction is displayed on a separate line.<p><a href='/help/binary_interactions' target='_top'>More...</a></p>Binary interactionsi

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGrid)

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BioGridi
4262725, 159 interactors

ComplexPortal: manually curated resource of macromolecular complexes

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ComplexPortali
CPX-1926 DNA polymerase III clamp loader complex
CPX-1964 DNA polymerase III clamp loader chi-psi subcomplex

Database of interacting proteins

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DIPi
DIP-9933N

Protein interaction database and analysis system

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IntActi
P28905, 41 interactors

Molecular INTeraction database

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MINTi
P28905

STRING: functional protein association networks

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STRINGi
316385.ECDH10B_4452

<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

Secondary structure

1147
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details

3D structure databases

Protein Model Portal of the PSI-Nature Structural Biology Knowledgebase

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ProteinModelPortali
P28905

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

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SMRi
P28905

Database of comparative protein structure models

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ModBasei
Search...

MobiDB: a database of protein disorder and mobility annotations

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MobiDBi
Search...

Miscellaneous databases

Relative evolutionary importance of amino acids within a protein sequence

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EvolutionaryTracei
P28905

<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

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
ENOG4105MYG Bacteria
COG2927 LUCA

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

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HOGENOMi
HOG000263567

InParanoid: Eukaryotic Ortholog Groups

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InParanoidi
P28905

KEGG Orthology (KO)

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KOi
K02339

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

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Gene3Di
3.40.50.10110, 1 hit

Integrated resource of protein families, domains and functional sites

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InterProi
View protein in InterPro
IPR007459 DNA_pol3_chi
IPR036768 PolIII_chi_sf

The PANTHER Classification System

More...
PANTHERi
PTHR38767 PTHR38767, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF04364 DNA_pol3_chi, 1 hit

Superfamily database of structural and functional annotation

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SUPFAMi
SSF102400 SSF102400, 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_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>.<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_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">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.

P28905-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MKNATFYLLD NDTTVDGLSA VEQLVCEIAA ERWRSGKRVL IACEDEKQAY
60 70 80 90 100
RLDEALWARP AESFVPHNLA GEGPRGGAPV EIAWPQKRSS SRRDILISLR
110 120 130 140
TSFADFATAF TEVVDFVPYE DSLKQLARER YKAYRVAGFN LNTATWK
Length:147
Mass (Da):16,633
Last modified:December 1, 1992 - 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:i7FEFFC359B28AA88
GO

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

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EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
L04574 Genomic DNA Translation: AAA70368.1
Z14155 Genomic DNA Translation: CAA78524.1
U14003 Genomic DNA Translation: AAA97156.1
U00096 Genomic DNA Translation: AAC77216.1
AP009048 Genomic DNA Translation: BAE78256.1
X15130 Genomic DNA Translation: CAA33226.1

Protein sequence database of the Protein Information Resource

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PIRi
A46739

NCBI Reference Sequences

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RefSeqi
NP_418680.1, NC_000913.3
WP_000786400.1, NZ_LN832404.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
AAC77216; AAC77216; b4259
BAE78256; BAE78256; BAE78256

Database of genes from NCBI RefSeq genomes

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GeneIDi
948787

KEGG: Kyoto Encyclopedia of Genes and Genomes

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KEGGi
ecj:JW4216
eco:b4259

Pathosystems Resource Integration Center (PATRIC)

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PATRICi
fig|1411691.4.peg.2445

<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
L04574 Genomic DNA Translation: AAA70368.1
Z14155 Genomic DNA Translation: CAA78524.1
U14003 Genomic DNA Translation: AAA97156.1
U00096 Genomic DNA Translation: AAC77216.1
AP009048 Genomic DNA Translation: BAE78256.1
X15130 Genomic DNA Translation: CAA33226.1
PIRiA46739
RefSeqiNP_418680.1, NC_000913.3
WP_000786400.1, NZ_LN832404.1

3D structure databases

Select the link destinations:

Protein Data Bank Europe

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PDBei

Protein Data Bank RCSB

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RCSB PDBi

Protein Data Bank Japan

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PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1EM8X-ray2.10A/C1-147[»]
3SXUX-ray1.85A1-147[»]
ProteinModelPortaliP28905
SMRiP28905
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

BioGridi4262725, 159 interactors
ComplexPortaliCPX-1926 DNA polymerase III clamp loader complex
CPX-1964 DNA polymerase III clamp loader chi-psi subcomplex
DIPiDIP-9933N
IntActiP28905, 41 interactors
MINTiP28905
STRINGi316385.ECDH10B_4452

Proteomic databases

PaxDbiP28905
PRIDEiP28905

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiAAC77216; AAC77216; b4259
BAE78256; BAE78256; BAE78256
GeneIDi948787
KEGGiecj:JW4216
eco:b4259
PATRICifig|1411691.4.peg.2445

Organism-specific databases

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

More...
EchoBASEi
EB1385
EcoGeneiEG11413 holC

Phylogenomic databases

eggNOGiENOG4105MYG Bacteria
COG2927 LUCA
HOGENOMiHOG000263567
InParanoidiP28905
KOiK02339

Enzyme and pathway databases

BioCyciEcoCyc:EG11413-MONOMER
MetaCyc:EG11413-MONOMER

Miscellaneous databases

EvolutionaryTraceiP28905

Protein Ontology

More...
PROi
PR:P28905

Family and domain databases

Gene3Di3.40.50.10110, 1 hit
InterProiView protein in InterPro
IPR007459 DNA_pol3_chi
IPR036768 PolIII_chi_sf
PANTHERiPTHR38767 PTHR38767, 1 hit
PfamiView protein in Pfam
PF04364 DNA_pol3_chi, 1 hit
SUPFAMiSSF102400 SSF102400, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
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 nameiHOLC_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: P28905
Secondary accession number(s): P11649, Q2M650
<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_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: December 1, 1992
Last sequence update: December 1, 1992
Last modified: December 5, 2018
This is version 140 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

Keywords - Technical termi

3D-structure, Complete proteome, Direct protein sequencing, Reference proteome

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. Escherichia coli
    Escherichia coli (strain K12): entries and cross-references to EcoGene
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