TNPO3 gene

transportin 3

The information on this page was automatically extracted from online scientific databases.

From NCBI Gene:

The protein encoded by this gene is a nuclear import receptor for serine/arginine-rich (SR) proteins such as the splicing factors SFRS1 and SFRS2. The encoded protein has also been shown to be involved in HIV-1 infection, apparently through interaction with the HIV-1 capsid protein. Several protein-coding and non-coding transcript variants have been found for this gene. [provided by RefSeq, Apr 2020]

From UniProt:

(Microbial infection) Involved in immunodeficiency virus (HIV-1) infection by importing the pre-integration complex (PIC) into the nucleus (PubMed:18722123, PubMed:21901095, PubMed:22398280, PubMed:29329553). Required for a nuclear maturation step of HIV-1 prior to integration (PubMed:21901095, PubMed:22398280).

Importin, which transports target proteins into the nucleus (PubMed:10366588, PubMed:10713112, PubMed:11517331, PubMed:12628928, PubMed:24449914). Specifically mediates the nuclear import of splicing factor serine/arginine (SR) proteins, such as RBM4, SFRS1 and SFRS2, by recognizing phosphorylated SR domains (PubMed:10366588, PubMed:10713112, PubMed:11517331, PubMed:12628928, PubMed:24449914). Also mediates the nuclear import of serine/arginine (SR) protein CPSF6, independently of CPSF6 phosphorylation (PubMed:30916345, PubMed:31465518). The nuclear import process is regulated by the small GTPase Ran that partitions between cytoplasm and nucleus in the predominantly GDP- and GTP-bound form, respectively (PubMed:23878195, PubMed:24449914). Importin associates with target cargo proteins in the cytoplasm, and the competitive binding of GTP-bound Ran induces the release of cargos in the nucleus (PubMed:23878195, PubMed:24449914).

Covered on Genetics Home Reference:

From NCBI Gene:

  • Limb-girdle muscular dystrophy, type 1F

From UniProt:

Muscular dystrophy, limb-girdle, autosomal dominant 2 (LGMDD2): An autosomal dominant myopathy characterized by proximal muscle weakness primarily affecting the lower limbs, but also affecting the upper limbs in most patients. Affected individuals also have distal muscle weakness of the hands and lower leg muscles. The disease has generally a benign clinical course but some individuals with childhood or juvenile onset manifest severe widespread myopathy, leading to wheelchair dependency and respiratory insufficiency. Muscle biopsy shows dystrophic changes with abnormal nuclei, rimmed vacuoles, and filamentous inclusions. [MIM:608423]

Cytogenetic Location: 7q32.1, which is the long (q) arm of chromosome 7 at position 32.1

Molecular Location: base pairs 128,954,180 to 129,055,173 on chromosome 7 (Homo sapiens Updated Annotation Release 109.20200228, GRCh38.p13) (NCBI)

Cytogenetic Location: 7q32.1, which is the long (q) arm of chromosome 7 at position 32.1
  • IPO12
  • LGMD1F
  • LGMDD2
  • MTR10A
  • TRN-SR
  • TRN-SR2