6qtv: Difference between revisions
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==Crystal structure of an Arabidopsis WD40 domain in complex with an atypical bHLH transcription factor== | |||
<StructureSection load='6qtv' size='340' side='right'caption='[[6qtv]], [[Resolution|resolution]] 1.31Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[6qtv]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6QTV OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6QTV FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MLI:MALONATE+ION'>MLI</scene></td></tr> | |||
[[Category: | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACE:ACETYL+GROUP'>ACE</scene>, <scene name='pdbligand=CSO:S-HYDROXYCYSTEINE'>CSO</scene></td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/RING-type_E3_ubiquitin_transferase RING-type E3 ubiquitin transferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.2.27 2.3.2.27] </span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6qtv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6qtv OCA], [http://pdbe.org/6qtv PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6qtv RCSB], [http://www.ebi.ac.uk/pdbsum/6qtv PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6qtv ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[[http://www.uniprot.org/uniprot/COP1_ARATH COP1_ARATH]] E3 ubiquitin-protein ligase that acts as a repressor of photomorphogenesis and as an activator of etiolation in darkness. E3 ubiquitin ligases accept ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. Represses photomorphogenesis in darkness by mediating ubiquitination and subsequent proteasomal degradation of light-induced transcription factors such as HY5, HYH and LAF1. Down-regulates MYB21, probably via ubiquitination process. Light stimuli abrogate the repression of photomorphogenesis, possibly due to its localization to the cytoplasm. Could play a role in switching between skotomorphogenetic and photomorphogenetic pathways.<ref>PMID:11967090</ref> <ref>PMID:12023303</ref> [[http://www.uniprot.org/uniprot/HFR1_ARATH HFR1_ARATH]] Atypical bHLH transcription factor that regulates photomorphogenesis through modulation of phytochrome (e.g. PHYA) and cryptochrome signalings (Ref.4, PubMed:11090209, PubMed:10995393, PubMed:19482971). Suppresses the transcriptional regulation activity of PIF4 by forming non-DNA-binding heterodimer.<ref>PMID:10995393</ref> <ref>PMID:11090209</ref> <ref>PMID:19482971</ref> <ref>PMID:11090209</ref> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: RING-type E3 ubiquitin transferase]] | |||
[[Category: Hothorn, M]] | |||
[[Category: Lau, K]] | [[Category: Lau, K]] | ||
[[Category: | [[Category: Complex]] | ||
[[Category: Plant protein]] | |||
