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Entry version 148 (29 Sep 2021)
Sequence version 1 (01 Nov 1990)
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Protein

Nuclear factor 1 B-type

Gene

NFIB

Organism
Gallus gallus (Chicken)
Status
Reviewed-Annotation score:

Annotation score:5 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

Recognizes and binds the palindromic sequence 5'-TTGGCNNNNNGCCAA-3' present in viral and cellular promoters and in the origin of replication of adenovirus type 2. These proteins are individually capable of activating transcription and replication.

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section specifies the position and type of each DNA-binding domain present within the protein.<p><a href='/help/dna_bind' target='_top'>More...</a></p>DNA bindingi1 – 195CTF/NF-IPROSITE-ProRule annotationAdd BLAST195

<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 functionActivator, DNA-binding
Biological processDNA replication, Transcription, Transcription regulation

<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:
Nuclear factor 1 B-type
Short name:
NF1-B
Short name:
Nuclear factor 1/B
Alternative name(s):
CCAAT-box-binding transcription factor
Short name:
CTF
Nuclear factor I/B
Short name:
NF-I/B
Short name:
NFI-B
TGGCA-binding protein
<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:NFIB
Synonyms:NFI-B
<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>OrganismiGallus gallus (Chicken)
<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 identifieri9031 [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 lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiArchelosauriaArchosauriaDinosauriaSaurischiaTheropodaCoelurosauriaAvesNeognathaeGalloanseraeGalliformesPhasianidaePhasianinaeGallus
<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
  • UP000000539 <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 Z

<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

Keywords - Cellular componenti

Nucleus

<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_00001001981 – 560Nuclear factor 1 B-typeAdd BLAST560

Proteomic databases

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

More...
PaxDbi
P17924

<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

Gene expression databases

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
P17924, baseline and differential

<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

Binds DNA as a homodimer.

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
9031.ENSGALP00000008721

<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

<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

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni257 – 369DisorderedSequence analysisAdd BLAST113
Regioni384 – 445DisorderedSequence analysisAdd BLAST62

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a short (usually not more than 20 amino acids) conserved sequence motif of biological significance.<p><a href='/help/motif' target='_top'>More...</a></p>Motifi396 – 4049aaTADBy similarity9

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes the position of regions of compositional bias within the protein and the particular type of amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi257 – 274Polar residuesSequence analysisAdd BLAST18
Compositional biasi287 – 301Polar residuesSequence analysisAdd BLAST15
Compositional biasi324 – 338Polar residuesSequence analysisAdd BLAST15
Compositional biasi397 – 423Polar residuesSequence analysisAdd BLAST27

<p>This subsection of the 'Family and domains' section provides general information on the biological role of a domain. The term 'domain' is intended here in its wide acceptation, it may be a structural domain, a transmembrane region or a functional domain. Several domains are described in this subsection.<p><a href='/help/domain_cc' target='_top'>More...</a></p>Domaini

The 9aaTAD motif is a transactivation domain present in a large number of yeast and animal transcription factors.By similarity

<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 CTF/NF-I family.PROSITE-ProRule annotation

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG3663, Eukaryota

Ensembl GeneTree

More...
GeneTreei
ENSGT00950000182916

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
P17924

Database for complete collections of gene phylogenies

More...
PhylomeDBi
P17924

TreeFam database of animal gene trees

More...
TreeFami
TF313889

Family and domain databases

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR000647, CTF/NFI
IPR020604, CTF/NFI_DNA-bd-dom
IPR019739, CTF/NFI_DNA-bd_CS
IPR019548, CTF/NFI_DNA-bd_N
IPR003619, MAD_homology1_Dwarfin-type

The PANTHER Classification System

More...
PANTHERi
PTHR11492, PTHR11492, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00859, CTF_NFI, 1 hit
PF03165, MH1, 1 hit
PF10524, NfI_DNAbd_pre-N, 1 hit

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00523, DWA, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00349, CTF_NFI_1, 1 hit
PS51080, CTF_NFI_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_length">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>Sequences (2+)i

<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.

This entry describes 2 <p>This subsection of the 'Sequence' section lists the alternative protein sequences (isoforms) that can be generated from the same gene by a single or by the combination of up to four biological events (alternative promoter usage, alternative splicing, alternative initiation and ribosomal frameshifting). Additionally, this section gives relevant information on each alternative protein isoform.<p><a href='/help/alternative_products' target='_top'>More...</a></p> isoformsi produced by alternative splicing. AlignAdd to basket

This entry has 2 described isoforms and 3 potential isoforms that are computationally mapped.Show allAlign All

Isoform 1 (identifier: P17924-1) [UniParc]FASTAAdd to basket
Also known as: NFI-B1

This isoform has been chosen as the <div> <p><b>What is the canonical sequence?</b><p><a href='/help/canonical_and_isoforms' target='_top'>More...</a></p>canonicali sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.

« Hide
        10         20         30         40         50
MMYSPICLTQ DEFHPFIEAL LPHVRAIAYT WFNLQARKRK YFKKHEKRMS
60 70 80 90 100
KDEERAVKDE LLSEKPEIKQ KWASRLLAKL RKDIRQEFRE DFVLTVTGKK
110 120 130 140 150
HPCCVLSNPD QKGKIRRIDC LRQADKVWRL DLVMVILFKG IPLESTDGER
160 170 180 190 200
LMKSPHCTNP ALCVQPHHIT VSVKELDLFL AYYVQEQDSG QPGSPSHNDP
210 220 230 240 250
AKNPPVYLED SFVKSGVFNV SELVRVSRTP ITQGTGVNFP IGELPSQPYY
260 270 280 290 300
HDMNSGINLQ RSLSSPPSSK RPKTISIDEN MEPSPTGDFY PSPNSPAAGS
310 320 330 340 350
RTWHERDQDM SSPTMKKPEK PLFSPTSPQD SSPRLSTFPQ HHHPGIPGVA
360 370 380 390 400
QSVISTRTPP SPSPLPFPAQ AILPPAPSSY FSHPTIRYPP HLNPQDTLKN
410 420 430 440 450
YVPSYDPSSP QTSQPNSSGQ VVGKVPGHFT PVLAPSPHHS AVRPVTLTMT
460 470 480 490 500
DTKPITTSTE AYTASGTSQA NRYVGLSPRD PSFLHQQQLR ICDWTMNQNG
510 520 530 540 550
RHLYPSASED TLGITWQSPG TWASLVPFQV SNRTPILPTN VPNYGLNIIG
560
EPFLQAESSN
Length:560
Mass (Da):62,623
Last modified:November 1, 1990 - 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:i24D31C5E2651F044
GO
Isoform 2 (identifier: P17924-2) [UniParc]FASTAAdd to basket
Also known as: NFI-B2

The sequence of this isoform differs from the canonical sequence as follows:
     415-419: PNSSG → SWYLG
     420-560: Missing.

Show »
Length:419
Mass (Da):47,409
Checksum:i6DB67928331D466C
GO

<p>In eukaryotic reference proteomes, unreviewed entries that are likely to belong to the same gene are computationally mapped, based on gene identifiers from Ensembl, EnsemblGenomes and model organism databases.<p><a href='/help/gene_centric_isoform_mapping' target='_top'>More...</a></p>Computationally mapped potential isoform sequencesi

There are 3 potential isoforms mapped to this entry.BLASTAlignShow allAdd to basket
EntryEntry nameProtein names
Gene namesLengthAnnotation
A0A1D5NWM2A0A1D5NWM2_CHICK
Nuclear factor 1
NFIB
502Annotation 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>
A0A1D5NZS7A0A1D5NZS7_CHICK
Nuclear factor 1
NFIB
560Annotation score:

Annotation score:2 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>
A0A1D5PQ76A0A1D5PQ76_CHICK
Nuclear factor 1
NFIB
486Annotation score:

Annotation score:2 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>

Alternative sequence

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section describes the sequence of naturally occurring alternative protein isoform(s). The changes in the amino acid sequence may be due to alternative splicing, alternative promoter usage, alternative initiation, or ribosomal frameshifting.<p><a href='/help/var_seq' target='_top'>More...</a></p>Alternative sequenceiVSP_003550415 – 419PNSSG → SWYLG in isoform 2. 1 Publication5
Alternative sequenceiVSP_003551420 – 560Missing in isoform 2. 1 PublicationAdd BLAST141

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
X51485 mRNA Translation: CAA35852.1
X51484 mRNA Translation: CAA35851.1

Protein sequence database of the Protein Information Resource

More...
PIRi
S09995

NCBI Reference Sequences

More...
RefSeqi
NP_990603.1, NM_205272.2 [P17924-1]
XP_015135568.1, XM_015280082.1 [P17924-2]

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...
Ensembli
ENSGALT00000061095; ENSGALP00000044762; ENSGALG00000005441 [P17924-1]

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
396209

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
gga:396209

Keywords - Coding sequence diversityi

Alternative splicing

<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
X51485 mRNA Translation: CAA35852.1
X51484 mRNA Translation: CAA35851.1
PIRiS09995
RefSeqiNP_990603.1, NM_205272.2 [P17924-1]
XP_015135568.1, XM_015280082.1 [P17924-2]

3D structure databases

Database of comparative protein structure models

More...
ModBasei
Search...

SWISS-MODEL Interactive Workspace

More...
SWISS-MODEL-Workspacei
Submit a new modelling project...

Protein-protein interaction databases

STRINGi9031.ENSGALP00000008721

Proteomic databases

PaxDbiP17924

Genome annotation databases

EnsembliENSGALT00000061095; ENSGALP00000044762; ENSGALG00000005441 [P17924-1]
GeneIDi396209
KEGGigga:396209

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
4781

Phylogenomic databases

eggNOGiKOG3663, Eukaryota
GeneTreeiENSGT00950000182916
InParanoidiP17924
PhylomeDBiP17924
TreeFamiTF313889

Miscellaneous databases

Protein Ontology

More...
PROi
PR:P17924

Gene expression databases

ExpressionAtlasiP17924, baseline and differential

Family and domain databases

InterProiView protein in InterPro
IPR000647, CTF/NFI
IPR020604, CTF/NFI_DNA-bd-dom
IPR019739, CTF/NFI_DNA-bd_CS
IPR019548, CTF/NFI_DNA-bd_N
IPR003619, MAD_homology1_Dwarfin-type
PANTHERiPTHR11492, PTHR11492, 1 hit
PfamiView protein in Pfam
PF00859, CTF_NFI, 1 hit
PF03165, MH1, 1 hit
PF10524, NfI_DNAbd_pre-N, 1 hit
SMARTiView protein in SMART
SM00523, DWA, 1 hit
PROSITEiView protein in PROSITE
PS00349, CTF_NFI_1, 1 hit
PS51080, CTF_NFI_2, 1 hit

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 nameiNFIB_CHICK
<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: P17924
Secondary accession number(s): P17925
<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: November 1, 1990
Last sequence update: November 1, 1990
Last modified: September 29, 2021
This is version 148 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 programChordata 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

Direct protein sequencing, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families
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