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KPNB1 karyopherin subunit beta 1 [ Homo sapiens (human) ]

Gene ID: 3837, updated on 12-Jul-2020

Summary

Official Symbol
KPNB1provided by HGNC
Official Full Name
karyopherin subunit beta 1provided by HGNC
Primary source
HGNC:HGNC:6400
See related
Ensembl:ENSG00000108424 MIM:602738
Gene type
protein coding
RefSeq status
REVIEWED
Organism
Homo sapiens
Lineage
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as
IMB1; IPO1; IPOB; Impnb; NTF97
Summary
Nucleocytoplasmic transport, a signal- and energy-dependent process, takes place through nuclear pore complexes embedded in the nuclear envelope. The import of proteins containing a nuclear localization signal (NLS) requires the NLS import receptor, a heterodimer of importin alpha and beta subunits also known as karyopherins. Importin alpha binds the NLS-containing cargo in the cytoplasm and importin beta docks the complex at the cytoplasmic side of the nuclear pore complex. In the presence of nucleoside triphosphates and the small GTP binding protein Ran, the complex moves into the nuclear pore complex and the importin subunits dissociate. Importin alpha enters the nucleoplasm with its passenger protein and importin beta remains at the pore. Interactions between importin beta and the FG repeats of nucleoporins are essential in translocation through the pore complex. The protein encoded by this gene is a member of the importin beta family. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Feb 2013]
Expression
Ubiquitous expression in testis (RPKM 74.8), appendix (RPKM 47.4) and 25 other tissues See more
Orthologs

Genomic context

See KPNB1 in Genome Data Viewer
Location:
17q21.32
Exon count:
23
Annotation release Status Assembly Chr Location
109.20200522 current GRCh38.p13 (GCF_000001405.39) 17 NC_000017.11 (47649919..47685505)
105 previous assembly GRCh37.p13 (GCF_000001405.25) 17 NC_000017.10 (45726861..45762037)

Chromosome 17 - NC_000017.11Genomic Context describing neighboring genes Neighboring gene mitochondrial ribosomal protein L45 pseudogene 2 Neighboring gene aminopeptidase puromycin sensitive Neighboring gene uncharacterized LOC112268184 Neighboring gene TBK1 binding protein 1 Neighboring gene TBX21 promoter region Neighboring gene T-box transcription factor 21

Genomic regions, transcripts, and products

Expression

  • Project title: HPA RNA-seq normal tissues
  • Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
  • BioProject: PRJEB4337
  • Publication: PMID 24309898
  • Analysis date: Wed Apr 4 07:08:55 2018

Bibliography

GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Phenotypes

NHGRI GWAS Catalog

Description
Genetic Loci Associated with Circulating Levels of Very Long-Chain Saturated Fatty Acids.
NHGRI GWA Catalog
Genome-wide meta-analysis identifies novel multiple sclerosis susceptibility loci.
NHGRI GWA Catalog

HIV-1 interactions

Replication interactions

Interaction Pubs
Knockdown of karyopherin (importin) beta 1 (KPNB1) by siRNA inhibits the early stages of HIV-1 replication in 293T cells infected with VSV-G pseudotyped HIV-1 PubMed

Protein interactions

Protein Gene Interaction Pubs
Envelope surface glycoprotein gp120 env Tandem affinity purification and mass spectrometry analysis identify karyopherin/importin beta 1 (KPNB1; nuclear factor p97), HIV-1 Gag, Gag/Pol, gp120, and Nef incorporated into staufen1 RNP complexes isolated from HIV-1-expressing cells PubMed
Gag-Pol gag-pol Tandem affinity purification and mass spectrometry analysis identify karyopherin/importin beta 1 (KPNB1; nuclear factor p97), HIV-1 Gag, Gag/Pol, gp120, and Nef incorporated into staufen1 RNP complexes isolated from HIV-1-expressing cells PubMed
Nef nef Tandem affinity purification and mass spectrometry analysis identify karyopherin/importin beta 1 (KPNB1; nuclear factor p97), HIV-1 Gag, Gag/Pol, gp120, and Nef incorporated into staufen1 RNP complexes isolated from HIV-1-expressing cells PubMed
Rev rev HIV-1 Rev interacting protein, karyopherin (importin) beta 1, is identified by the in-vitro binding experiments involving cytosolic or nuclear extracts from HeLa cells PubMed
rev HIV-1 Rev nuclear import mediated by importin beta is selectively blocked by competitive excess of HIC in a cell-specific fashion PubMed
rev importin beta can inhibit the interaction of HIV-1 Rev with HIV-1 RRE RNA PubMed
rev importin beta specifically binds to the Rev nuclear localization signal (NLS, amino acids 35-50) and mediates the nuclear import of Rev PubMed
Tat tat HIV-1 and the viral protein Tat modulate the expression of karyopherin (importin) beta 1 (KPNB1) in immature dendritic cells and monocyte-derived macrophages PubMed
tat HIV-1 Tat downregulates karyopherin (importin) beta 1 in HEK 293T cells PubMed
tat HIV-1 Tat peptide (amino-acids 47-57) binds to importin alpha and beta receptors PubMed
tat Importin beta binds to the HIV-1 Tat protein nuclear localization signal (NLS; amino acids 49-57) and mediates the nuclear import of Tat through a novel import pathway PubMed
tat The binding of HIV-1 Tat with importin beta is inhibited by RanGTP PubMed
Vpr vpr HIV-1 Vpr causes increased levels of CyclinB1, Plk1, and Cdk1 in a complex with the nuclear transport and spindle assembly protein, importin beta PubMed
vpr HIV-1 Vpr co-localizes with karyopherin beta and regulates karyopherin beta-mediated docking of the HIV-1 preintegration complex at the nuclear envelope, however multiple reports indicate the two proteins do not directly interact PubMed
integrase gag-pol Ivermectin, an inhibitor of importin alpha/beta1, inhibits HIV-1 infection by blocking the HIV-1 Integrase interaction with importin alpha/beta1 for viral protein nuclear import PubMed
gag-pol Some reports indicate a possible role for the interactions between karyopherin alpha and beta with HIV-1 integrase in the nuclear import of HIV-1 preintegration complexes (PIC), while other reports indicate integrase is not involved in PIC nuclear import PubMed
gag-pol Karyopherin beta binds to complexes between HIV-1 integrase (integrase/GST fusion protein) and karyopherin alpha, but not to integrase alone PubMed
gag-pol Karyopherin alpha and beta are reported to interact with HIV-1 integrase (IN) to facilitate nuclear import of IN, however a conflicting report indicates nuclear accumulation of IN does not involve karyopherin alpha, beta 1, or beta 2 mediated pathways PubMed
matrix gag Karyopherin beta mediates the nuclear import of HIV-1 preintegration complexes through karyopherin alpha, which binds directly to nuclear localization signals in HIV-1 Matrix PubMed

Go to the HIV-1, Human Interaction Database

Pathways from PubChem

Interactions

Products Interactant Other Gene Complex Source Pubs Description

General gene information

Markers

Homology

Clone Names

  • MGC2155, MGC2156, MGC2157

Gene Ontology Provided by GOA

Function Evidence Code Pubs
Hsp90 protein binding IEA
Inferred from Electronic Annotation
more info
 
RNA binding HDA PubMed 
Ran GTPase binding IEA
Inferred from Electronic Annotation
more info
 
enzyme binding IPI
Inferred from Physical Interaction
more info
PubMed 
importin-alpha family protein binding IEA
Inferred from Electronic Annotation
more info
 
nuclear import signal receptor activity IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
nuclear localization sequence binding IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
protein binding IPI
Inferred from Physical Interaction
more info
PubMed 
protein domain specific binding IPI
Inferred from Physical Interaction
more info
PubMed 
zinc ion binding TAS
Traceable Author Statement
more info
PubMed 
Process Evidence Code Pubs
NLS-bearing protein import into nucleus TAS
Traceable Author Statement
more info
PubMed 
Ran protein signal transduction IMP
Inferred from Mutant Phenotype
more info
PubMed 
apoptotic DNA fragmentation TAS
Traceable Author Statement
more info
 
astral microtubule organization IMP
Inferred from Mutant Phenotype
more info
PubMed 
establishment of mitotic spindle localization IMP
Inferred from Mutant Phenotype
more info
PubMed 
establishment of protein localization IMP
Inferred from Mutant Phenotype
more info
PubMed 
intracellular transport of virus TAS
Traceable Author Statement
more info
 
mitotic chromosome movement towards spindle pole IMP
Inferred from Mutant Phenotype
more info
PubMed 
mitotic metaphase plate congression IMP
Inferred from Mutant Phenotype
more info
PubMed 
mitotic spindle assembly IMP
Inferred from Mutant Phenotype
more info
PubMed 
modulation by virus of host process TAS
Traceable Author Statement
more info
 
neutrophil degranulation TAS
Traceable Author Statement
more info
 
protein import into nucleus IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
protein import into nucleus IDA
Inferred from Direct Assay
more info
PubMed 
regulation of cholesterol biosynthetic process TAS
Traceable Author Statement
more info
 
ribosomal protein import into nucleus IDA
Inferred from Direct Assay
more info
PubMed 
Component Evidence Code Pubs
cytoplasm IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
cytoplasmic stress granule ISS
Inferred from Sequence or Structural Similarity
more info
 
cytosol IDA
Inferred from Direct Assay
more info
 
cytosol TAS
Traceable Author Statement
more info
 
endoplasmic reticulum tubular network IDA
Inferred from Direct Assay
more info
PubMed 
extracellular exosome HDA PubMed 
extracellular region TAS
Traceable Author Statement
more info
 
ficolin-1-rich granule lumen TAS
Traceable Author Statement
more info
 
host cell IEA
Inferred from Electronic Annotation
more info
 
membrane HDA PubMed 
nuclear envelope IDA
Inferred from Direct Assay
more info
PubMed 
nuclear membrane IDA
Inferred from Direct Assay
more info
 
nuclear pore TAS
Traceable Author Statement
more info
PubMed 
nucleoplasm IDA
Inferred from Direct Assay
more info
 
nucleoplasm TAS
Traceable Author Statement
more info
 
nucleus IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
specific granule lumen TAS
Traceable Author Statement
more info
 

General protein information

Preferred Names
importin subunit beta-1
Names
PTAC97
importin 1
importin 90
importin beta-1 subunit
karyopherin (importin) beta 1
nuclear factor p97
pore targeting complex 97 kDa subunit

NCBI Reference Sequences (RefSeq)

RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

mRNA and Protein(s)

  1. NM_001276453.2NP_001263382.1  importin subunit beta-1 isoform 2

    See identical proteins and their annotated locations for NP_001263382.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (2) has an alternate exon in place of the first two exons compared to variant 1, which causes translation to begin at a downstream AUG compared to variant 1. The resulting isoform (2) is shorter at the N-terminus compared to isoform 1.
    Source sequence(s)
    AC015674, AC025682, KF570270
    Consensus CDS
    CCDS62228.1
    UniProtKB/Swiss-Prot
    Q14974
    UniProtKB/TrEMBL
    B7Z752
    Related
    ENSP00000438964.1, ENST00000540627.5
    Conserved Domains (2) summary
    COG5215
    Location:2726
    KAP95; Karyopherin (importin) beta [Intracellular trafficking and secretion]
    sd00044
    Location:178209
    HEAT; HEAT repeat [structural motif]
  2. NM_002265.6NP_002256.2  importin subunit beta-1 isoform 1

    See identical proteins and their annotated locations for NP_002256.2

    Status: REVIEWED

    Description
    Transcript Variant: This variant (1) represents the longer transcript and encodes the longer isoform (1).
    Source sequence(s)
    AC015674, AC025682, KF570270
    Consensus CDS
    CCDS11513.1
    UniProtKB/Swiss-Prot
    Q14974
    Related
    ENSP00000290158.3, ENST00000290158.9
    Conserved Domains (2) summary
    COG5215
    Location:2871
    KAP95; Karyopherin (importin) beta [Intracellular trafficking and secretion]
    sd00044
    Location:323354
    HEAT; HEAT repeat [structural motif]

RefSeqs of Annotated Genomes: Homo sapiens Updated Annotation Release 109.

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference GRCh38.p13 Primary Assembly

Genomic

  1. NC_000017.11 Reference GRCh38.p13 Primary Assembly

    Range
    47649919..47685505
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)
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