Structural highlights
Function
MGRN1_HUMAN E3 ubiquitin-protein ligase. Mediates monoubiquitination at multiple sites of TSG101 in the presence of UBE2D1, but not of UBE2G1, nor UBE2H (PubMed:17229889, PubMed:19703557). Plays a role in the regulation of endosome-to-lysosome trafficking (PubMed:17229889). Impairs MC1R- and MC4R-signaling by competing with GNAS-binding to MCRs and inhibiting agonist-induced cAMP production (PubMed:19737927). Does not inhibit ADRB2-signaling (PubMed:19737927). Does not promote MC1R ubiquitination (PubMed:19737927). Acts also as a negative regulator of hedgehog signaling (By similarity).[UniProtKB:Q9D074][1] [2] [3]
References
- ↑ Kim BY, Olzmann JA, Barsh GS, Chin LS, Li L. Spongiform neurodegeneration-associated E3 ligase Mahogunin ubiquitylates TSG101 and regulates endosomal trafficking. Mol Biol Cell. 2007 Apr;18(4):1129-42. doi: 10.1091/mbc.e06-09-0787. Epub 2007 , Jan 17. PMID:17229889 doi:https://dx.doi.org/10.1091/mbc.e06-09-0787
- ↑ Jiao J, Sun K, Walker WP, Bagher P, Cota CD, Gunn TM. Abnormal regulation of TSG101 in mice with spongiform neurodegeneration. Biochim Biophys Acta. 2009 Oct;1792(10):1027-35. doi: , 10.1016/j.bbadis.2009.08.009. Epub 2009 Aug 22. PMID:19703557 doi:https://dx.doi.org/10.1016/j.bbadis.2009.08.009
- ↑ Pérez-Oliva AB, Olivares C, Jiménez-Cervantes C, García-Borrón JC. Mahogunin ring finger-1 (MGRN1) E3 ubiquitin ligase inhibits signaling from melanocortin receptor by competition with Galphas. J Biol Chem. 2009 Nov 13;284(46):31714-25. PMID:19737927 doi:10.1074/jbc.M109.028100