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Protein

Importin subunit alpha

Gene

Pen

Organism
Drosophila melanogaster (Fruit fly)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

Binds specifically and directly to substrates containing either a simple or bipartite NLS motif. Promotes docking of import substrates to the nuclear envelope. Seems to act as a cytosolic receptor for both simple and bipartite NLS motifs (By similarity).By similarity
It is required for normal cell proliferation and may serve as an adapter molecule to form complexes with other proteins. May act as a tumor suppressor in hematopoietic cells. May play a role in the nuclear import of karyophilic proteins and some of these may be required for the normal transmission and function of proliferative signals in the cells.

GO - Molecular functioni

GO - Biological processi

  • female germline ring canal formation Source: FlyBase
  • gravitaxis Source: FlyBase
  • lymph gland development Source: FlyBase
  • NLS-bearing protein import into nucleus Source: FlyBase
  • sperm individualization Source: FlyBase

Keywordsi

Biological processProtein transport, Transport

Enzyme and pathway databases

ReactomeiR-DME-5693548. Sensing of DNA Double Strand Breaks.
SignaLinkiP52295.

Names & Taxonomyi

Protein namesi
Recommended name:
Importin subunit alpha
Alternative name(s):
Karyopherin subunit alpha
Pendulin
Gene namesi
Name:Pen
ORF Names:CG4799
OrganismiDrosophila melanogaster (Fruit fly)
Taxonomic identifieri7227 [NCBI]
Taxonomic lineageiEukaryotaMetazoaEcdysozoaArthropodaHexapodaInsectaPterygotaNeopteraHolometabolaDipteraBrachyceraMuscomorphaEphydroideaDrosophilidaeDrosophilaSophophora
Proteomesi
  • UP000000803 Componenti: Chromosome 2L

Organism-specific databases

FlyBaseiFBgn0267727. Pen.

Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte; Source: COMPARTMENTS

Keywords - Cellular componenti

Cytoplasm, Nucleus

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001207331 – 522Importin subunit alphaAdd BLAST522

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei12Phosphoserine1 Publication1
Modified residuei17Phosphoserine1 Publication1
Modified residuei56Phosphoserine1 Publication1
Modified residuei65Phosphoserine1 Publication1

Keywords - PTMi

Phosphoprotein

Proteomic databases

PaxDbiP52295.
PRIDEiP52295.

PTM databases

iPTMnetiP52295.

Expressioni

Tissue specificityi

Predominantly expressed in the neuroblast stem cells.

Developmental stagei

High levels are detected during the first half of embryogenesis reaching a maximum between 4 and 8 hours of development. Protein expression increases again from the third larval instar onwards. It is expressed in a maternal/early embryonic phase, and again during morphogenesis in late larval and pupal stages.

Gene expression databases

BgeeiFBgn0267727.
GenevisibleiP52295. DM.

Interactioni

Subunit structurei

Forms a complex with importin beta subunit.

Protein-protein interaction databases

BioGridi60430. 46 interactors.
DIPiDIP-17105N.
IntActiP52295. 5 interactors.
MINTiMINT-292464.
STRINGi7227.FBpp0079527.

Structurei

3D structure databases

ProteinModelPortaliP52295.
SMRiP52295.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini1 – 56IBBPROSITE-ProRule annotationAdd BLAST56
Repeati64 – 105ARM 1Add BLAST42
Repeati106 – 148ARM 2Add BLAST43
Repeati149 – 190ARM 3Add BLAST42
Repeati191 – 233ARM 4Add BLAST43
Repeati234 – 275ARM 5Add BLAST42
Repeati276 – 317ARM 6Add BLAST42
Repeati318 – 359ARM 7Add BLAST42
Repeati360 – 400ARM 8Add BLAST41
Repeati401 – 447ARM 9Add BLAST47
Repeati448 – 489ARM 10Add BLAST42

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Compositional biasi490 – 522Asp/Glu-rich (acidic)Add BLAST33

Sequence similaritiesi

Belongs to the importin alpha family.Curated

Keywords - Domaini

Repeat

Phylogenomic databases

eggNOGiKOG0166. Eukaryota.
COG5064. LUCA.
GeneTreeiENSGT00760000119094.
InParanoidiP52295.
KOiK15043.
OMAiDQTRCVI.
OrthoDBiEOG091G095Z.
PhylomeDBiP52295.

Family and domain databases

Gene3Di1.25.10.10. 1 hit.
InterProiView protein in InterPro
IPR011989. ARM-like.
IPR016024. ARM-type_fold.
IPR032413. Arm_3.
IPR000225. Armadillo.
IPR002652. Importin-a_IBB.
IPR024931. Importing_su_alpha.
PfamiView protein in Pfam
PF00514. Arm. 7 hits.
PF16186. Arm_3. 1 hit.
PF01749. IBB. 1 hit.
PIRSFiPIRSF005673. Importin_alpha. 1 hit.
SMARTiView protein in SMART
SM00185. ARM. 8 hits.
SUPFAMiSSF48371. SSF48371. 1 hit.
PROSITEiView protein in PROSITE
PS50176. ARM_REPEAT. 3 hits.
PS51214. IBB. 1 hit.

Sequencei

Sequence statusi: Complete.

P52295-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MSKADSNSRQ GSYKANSINT QDSRMRRHEV TIELRKSKKE DQMFKRRNIN
60 70 80 90 100
DEDLTSPLKE LNGQSPVQLS VDEIVAAMNS EDQERQFLGM QSARKMLSRE
110 120 130 140 150
RNPPIDLMIG HGIVPICIRF LQNTNNSMLQ FEAAWALTNI ASGTSDQTRC
160 170 180 190 200
VIEHNAVPHF VALLQSKSMN LAEQAVWALG NIAGDGAAAR DIVIHHNVID
210 220 230 240 250
GILPLINNET PLSFLRNIVW LMSNLCRNKN PSPPFDQVKR LLPVLSQLLL
260 270 280 290 300
SQDIQVLADA CWALSYVTDD DNTKIQAVVD SDAVPRLVKL LQMDEPSIIV
310 320 330 340 350
PALRSVGNIV TGTDQQTDVV IASGGLPRLG LLLQHNKSNI VKEAAWTVSN
360 370 380 390 400
ITAGNQKQIQ AVIQAGIFQQ LRTVLEKGDF KAQKEAAWAV TNTTTSGTPE
410 420 430 440 450
QIVDLIEKYK ILKPFIDLLD TKDPRTIKVV QTGLSNLFAL AEKLGGTENL
460 470 480 490 500
CLMVEEMGGL DKLETLQQHE NEEVYKKAYA IIDTYFSNGD DEAEQELAPQ
510 520
EVNGALEFNA TQPKAPEGGY TF
Length:522
Mass (Da):57,822
Last modified:December 1, 2000 - v2
Checksum:iB02773EB76812AD1
GO

Sequence cautioni

P52295: The sequence AAL29091 differs from that shown. Reason: Erroneous translation. Wrong choice of frame.Curated

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti69L → P in AAA85260 (PubMed:7790350).Curated1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
U12269 mRNA. Translation: AAA85260.1.
X85752 Genomic DNA. Translation: CAA59753.1.
AE014134 Genomic DNA. Translation: AAF52853.1.
AY061543 mRNA. Translation: AAL29091.1. Sequence problems.
BT003258 mRNA. Translation: AAO25015.1.
PIRiA57319.
RefSeqiNP_477041.1. NM_057693.5.
UniGeneiDm.3560.

Genome annotation databases

EnsemblMetazoaiFBtr0079937; FBpp0079527; FBgn0267727.
GeneIDi34338.
KEGGidme:Dmel_CG4799.

Similar proteinsi

Entry informationi

Entry nameiIMA_DROME
AccessioniPrimary (citable) accession number: P52295
Secondary accession number(s): Q24431, Q95R96, Q9VL45
Entry historyiIntegrated into UniProtKB/Swiss-Prot: October 1, 1996
Last sequence update: December 1, 2000
Last modified: October 25, 2017
This is version 159 of the entry and version 2 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programDrosophila annotation project

Miscellaneousi

Caution

Was originally thought to be the overgrown hematopoietic organs-31 protein (OHO-31).1 Publication

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. Drosophila
    Drosophila: entries, gene names and cross-references to FlyBase
  2. SIMILARITY comments
    Index of protein domains and families