4mz5: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
{{STRUCTURE_4mz5| PDB=4mz5 | SCENE= }} | |||
===Structure of importin-alpha: dUTPase NLS complex=== | |||
The | ==Function== | ||
[[http://www.uniprot.org/uniprot/DUT_HUMAN DUT_HUMAN]] This enzyme is involved in nucleotide metabolism: it produces dUMP, the immediate precursor of thymidine nucleotides and it decreases the intracellular concentration of dUTP so that uracil cannot be incorporated into DNA.<ref>PMID:8805593</ref> [[http://www.uniprot.org/uniprot/IMA1_MOUSE IMA1_MOUSE]] Functions in nuclear protein import as an adapter protein for nuclear receptor KPNB1. Binds specifically and directly to substrates containing either a simple or bipartite NLS motif. Docking of the importin/substrate complex to the nuclear pore complex (NPC) is mediated by KPNB1 through binding to nucleoporin FxFG repeats and the complex is subsequently translocated through the pore by an energy requiring, Ran-dependent mechanism. At the nucleoplasmic side of the NPC, Ran binds to importin-beta and the three components separate and importin-alpha and -beta are re-exported from the nucleus to the cytoplasm where GTP hydrolysis releases Ran from importin. The directionality of nuclear import is thought to be conferred by an asymmetric distribution of the GTP- and GDP-bound forms of Ran between the cytoplasm and nucleus. | |||
==About this Structure== | |||
[[4mz5]] is a 3 chain structure. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=4fdr 4fdr]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4MZ5 OCA]. | |||
==Reference== | |||
<references group="xtra"/><references/> | |||
[[Category: Kobe, B.]] | |||
[[Category: Marfori, M.]] | |||
[[Category: Rona, G.]] | |||
[[Category: Vertessy, B G.]] | |||
[[Category: Arm repeat]] | |||
[[Category: Importin]] | |||
[[Category: Nucleus]] | |||
[[Category: Protein transport]] | |||