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Entry version 125 (02 Dec 2020)
Sequence version 3 (28 Feb 2003)
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Protein

Nitrogenase molybdenum-iron protein beta chain

Gene

nifK

Organism
Bradyrhizobium diazoefficiens (strain JCM 10833 / BCRC 13528 / IAM 13628 / NBRC 14792 / USDA 110)
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

This molybdenum-iron protein is part of the nitrogenase complex that catalyzes the key enzymatic reactions in nitrogen fixation.

Miscellaneous

Ala-187 is present instead of the usual Ser that would serve as a ligand for the 8Fe-7S cluster in the oxidized state.

<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 'Function' section provides information relevant to cofactors. A cofactor is any non-protein substance required for a protein to be catalytically active. Some cofactors are inorganic, such as the metal atoms zinc, iron, and copper in various oxidation states. Others, such as most vitamins, are organic.<p><a href='/help/cofactor' target='_top'>More...</a></p>Cofactori

[8Fe-7S] clusterBy similarityNote: Binds 1 [8Fe-7S] cluster per heterodimer.By similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section indicates at which position the protein binds a given metal ion. The nature of the metal is indicated in the 'Description' field.<p><a href='/help/metal' target='_top'>More...</a></p>Metal bindingi69Iron-sulfur (8Fe-7S); shared with alpha chainBy similarity1
Metal bindingi94Iron-sulfur (8Fe-7S); shared with alpha chainBy similarity1
Metal bindingi152Iron-sulfur (8Fe-7S); shared with alpha chainBy 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

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 processNitrogen fixation
LigandATP-binding, Iron, Iron-sulfur, Metal-binding, Nucleotide-binding

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
BDIA224911:G1G3J-1764-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%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:
Nitrogenase molybdenum-iron protein beta chain (EC:1.18.6.1)
Alternative name(s):
Dinitrogenase
Nitrogenase component I
<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:nifK
Ordered Locus Names:blr1744
<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>OrganismiBradyrhizobium diazoefficiens (strain JCM 10833 / BCRC 13528 / IAM 13628 / NBRC 14792 / USDA 110)
<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 identifieri224911 [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 lineageiBacteriaProteobacteriaAlphaproteobacteriaRhizobialesBradyrhizobiaceaeBradyrhizobium
<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
  • UP000002526 <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 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

<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_00001530941 – 518Nitrogenase molybdenum-iron protein beta chainAdd BLAST518

<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

Tetramer of two alpha and two beta chains. Forms complex with the iron protein (nitrogenase component 2).

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
224911.27349997

<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
P20621

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

Belongs to the NifD/NifK/NifE/NifN family.Curated

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
COG2710, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_025876_2_0_5

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
P20621

Identification of Orthologs from Complete Genome Data

More...
OMAi
GLNNMID

Database for complete collections of gene phylogenies

More...
PhylomeDBi
P20621

Family and domain databases

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR000510, Nase/OxRdtase_comp1
IPR000318, Nase_comp1_CS
IPR005976, Nase_Mo-Fe_CF_bsu
IPR024564, Nase_Mo-Fe_CF_bsu_N

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF11844, DUF3364, 1 hit
PF00148, Oxidored_nitro, 1 hit

TIGRFAMs; a protein family database

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TIGRFAMsi
TIGR01286, nifK, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00699, NITROGENASE_1_1, 1 hit
PS00090, NITROGENASE_1_2, 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.

P20621-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MPQSAEHVLD HVELFRGPEY QQMLAKKKIF ENPRDPAEVE RIKEWTKTAE
60 70 80 90 100
YREKNFAREA LAVNPAKACQ PLGAVFASVG FERTLPFVHG SQGCVAYYRS
110 120 130 140 150
HLSRHFKEPS SCVSSSMTED AAVFGGLNNM TDGLANSYKM YKPKMIAVST
160 170 180 190 200
TCMAEVIGDD LNAFIKTSKE KGSVPADFDV PFAHTPAFVG SHVTGYDNAL
210 220 230 240 250
KGILEHFWDG KAGTAPKLER KPNGAINIIG GFDGYTVGNL REIKRILELM
260 270 280 290 300
GIQHTVLADN SEVFDTPTDG EFRMYDGGTT LKDAANAIHA KATISMQQWC
310 320 330 340 350
TEKTLSFAAE HGQDVLSFNY PVGLSATDDF IVALSRISGK EIPEQLARER
360 370 380 390 400
GRLVDAIADS SAHVHGKKFA IYGDPDLCYG LAAFLLELGA EPTHVLSTNG
410 420 430 440 450
NKAWQEKMQA LLASSPFGQG CQVYPGRDLW HMRSLLFTEP VDFLIGNTYG
460 470 480 490 500
KYLERDTATP LIRIGFPIFD RHHHHRSPIW GYQGGLNVLV KILDKIFDEI
510
DNKTNILGKT DYSFDIIR
Length:518
Mass (Da):57,433
Last modified:February 28, 2003 - v3
<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:i6005D1230A4D083D
GO

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 conflicti477S → F in AAA26326 (Ref. 1) Curated1

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
M64591 Genomic DNA Translation: AAA26326.1
AF322012 Genomic DNA Translation: AAG60730.1
BA000040 Genomic DNA Translation: BAC47009.1
X01045 Genomic DNA Translation: CAA25524.1

Protein sequence database of the Protein Information Resource

More...
PIRi
S09548

NCBI Reference Sequences

More...
RefSeqi
NP_768384.1, NC_004463.1
WP_011084553.1, NZ_CP011360.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
BAC47009; BAC47009; BAC47009

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
46488958

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
bja:blr1744

Pathosystems Resource Integration Center (PATRIC)

More...
PATRICi
fig|224911.44.peg.1209

<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
M64591 Genomic DNA Translation: AAA26326.1
AF322012 Genomic DNA Translation: AAG60730.1
BA000040 Genomic DNA Translation: BAC47009.1
X01045 Genomic DNA Translation: CAA25524.1
PIRiS09548
RefSeqiNP_768384.1, NC_004463.1
WP_011084553.1, NZ_CP011360.1

3D structure databases

SMRiP20621
ModBaseiSearch...

Protein-protein interaction databases

STRINGi224911.27349997

Genome annotation databases

EnsemblBacteriaiBAC47009; BAC47009; BAC47009
GeneIDi46488958
KEGGibja:blr1744
PATRICifig|224911.44.peg.1209

Phylogenomic databases

eggNOGiCOG2710, Bacteria
HOGENOMiCLU_025876_2_0_5
InParanoidiP20621
OMAiGLNNMID
PhylomeDBiP20621

Enzyme and pathway databases

BioCyciBDIA224911:G1G3J-1764-MONOMER

Family and domain databases

InterProiView protein in InterPro
IPR000510, Nase/OxRdtase_comp1
IPR000318, Nase_comp1_CS
IPR005976, Nase_Mo-Fe_CF_bsu
IPR024564, Nase_Mo-Fe_CF_bsu_N
PfamiView protein in Pfam
PF11844, DUF3364, 1 hit
PF00148, Oxidored_nitro, 1 hit
TIGRFAMsiTIGR01286, nifK, 1 hit
PROSITEiView protein in PROSITE
PS00699, NITROGENASE_1_1, 1 hit
PS00090, NITROGENASE_1_2, 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 nameiNIFK_BRADU
<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: P20621
Secondary accession number(s): Q9ANN4
<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: February 1, 1991
Last sequence update: February 28, 2003
Last modified: December 2, 2020
This is version 125 of the entry and version 3 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

Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families
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