Protein: SUN domain-containing protein 1 (Protein unc-84 homolog A) (Sad1/unc-84 protein-like 1) (Q9D666)
Organism: Mus musculus (Mouse)
Function: As a component of the LINC (LInker of Nucleoskeleton and Cytoskeleton) complex involved in the connection between the nuclear lamina and the cytoskeleton. The nucleocytoplasmic interactions established by the LINC complex play an important role in the transmission of mechanical forces across the nuclear envelope and in nuclear movement and positioning. Required for interkinetic nuclear migration (INM) and essential for nucleokinesis and centrosome-nucleus coupling during radial neuronal migration in the cerebral cortex and during glial migration. Involved in telomere attachment to nuclear envelope in the prophase of meiosis implicating a SUN1/2:KASH5 LINC complex in which SUN1 and SUN2 seem to act at least partial redundantly. Required for gametogenesis and involved in selective gene expression of coding and non-coding RNAs needed for gametogenesis. Helps to define the distribution of nuclear pore complexes (NPCs). Required for efficient localization of SYNE4 in the nuclear envelope. May be involved in nuclear remodeling during sperm head formation in spermatogenesis. May play a role in DNA repair by suppressing non-homologous end joining repair to facilitate the repair of DNA cross-links (By similarity).
Subcellular location: Nucleus inner membrane {ECO:0000269|PubMed:11593002, ECO:0000269|PubMed:12036294, ECO:0000269|PubMed:16380439, ECO:0000269|PubMed:16648470, ECO:0000269|PubMed:17132086, ECO:0000269|PubMed:17724119, ECO:0000269|PubMed:18845190, ECO:0000269|PubMed:19841137, ECO:0000269|PubMed:19843581, ECO:0000269|PubMed:19874786, ECO:0000269|PubMed:23348741}; Single-pass type II membrane protein {ECO:0000269|PubMed:11593002, ECO:0000269|PubMed:12036294, ECO:0000269|PubMed:16380439, ECO:0000269|PubMed:16648470, ECO:0000269|PubMed:17132086, ECO:0000269|PubMed:17724119, ECO:0000269|PubMed:18845190, ECO:0000269|PubMed:19841137, ECO:0000269|PubMed:19843581, ECO:0000269|PubMed:19874786, ECO:0000269|PubMed:23348741}. Note=At oocyte MI stage localized around the spindle, at MII stage localized to the spindle poles. In round spermatids mainly localizes to the posterior pole of the nucleus. This localization is gradually disappearing during spermiogenesis. In elongated spermatids localizes to anterior regions outside the nucleus indicative for isoform 5. {ECO:0000269|PubMed:20711465, ECO:0000269|PubMed:26842404}.; SUBCELLULAR LOCATION: [Isoform 5]: Cytoplasmic vesicle, secretory vesicle, acrosome outer membrane {ECO:0000305|PubMed:20711465}. Note=Localized to the anterior pole of spermatids. {ECO:0000305|PubMed:20711465}.
Interaction partners:
- Protein KASH5
- Prelamin-A/C
- Nesprin-2
- Nesprin-1
- Emerin
- SUN domain-containing protein 2
- Telomere repeats-binding bouquet formation protein 1
- Nesprin-4
- Lamin-B1
- Nesprin-3
Sequence:
MDFSRLHTYTPPQCVPENTGYTYALSSSYSSDALDFETEHKLEPVFDSPRMSRRSLRLVTTASYSSGDSQAIDSHISTSRATPAKGRETRTVKQRRSASKPAFSINHLSGKGLSSSTSHDSSCSLRSATVLRHPVLDESLIREQTKVDHFWGLDDDGDLKGGNKAATQGNGELAAEVASSNGYTCRDCRMLSARTDALTAHSAIHGTTSRVYSRDRTLKPRGVSFYLDRTLWLAKSTSSSFASFIVQLFQVVLMKLNFETYKLKGYESRAYESQSYETKSHESEAHLGHCGRMTAGELSRVDGESLCDDCKGKKHLEIHTATHSQLPQPHRVAGAMGRLCIYTGDLLVQALRRTRAAGWSVAEAVWSVLWLAVSAPGKAASGTFWWLGSGWYQFVTLISWLNVFLLTRCLRNICKVFVLLLPLLLLLGAGVSLWGQGNFFSLLPVLNWTAMQPTQRVDDSKGMHRPGPLPPSPPPKVDHKASQWPQESDMGQKVASLSAQCHNHDERLAELTVLLQKLQIRVDQVDDGREGLSLWVKNVVGQHLQEMGTIEPPDAKTDFMTFHHDHEVRLSNLEDVLRKLTEKSEAIQKELEETKLKAGSRDEEQPLLDRVQHLELELNLLKSQLSDWQHLKTSCEQAGARIQETVQLMFSEDQQGGSLEWLLEKLSSRFVSKDELQVLLHDLELKLLQNITHHITVTGQAPTSEAIVSAVNQAGISGITEAQAHIIVNNALKLYSQDKTGMVDFALESGGGSILSTRCSETYETKTALLSLFGVPLWYFSQSPRVVIQPDIYPGNCWAFKGSQGYLVVRLSMKIYPTTFTMEHIPKTLSPTGNISSAPKDFAVYGLETEYQEEGQPLGRFTYDQEGDSLQMFHTLERPDQAFQIVELRVLSNWGHPEYTCLYRFRVHGEPIQ