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-Structure paper
タイトル | Rubisco in complex with Rubisco large subunit methyltransferase. |
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ジャーナル・号・ページ | Proc Natl Acad Sci U S A, Vol. 106, Issue 9, Page 3160-3165, Year 2009 |
掲載日 | 2009年3月3日 |
![]() | Stefan Raunser / Roberta Magnani / Zhong Huang / Robert L Houtz / Raymond C Trievel / Pawel A Penczek / Thomas Walz / ![]() |
PubMed 要旨 | SET domain protein lysine methyltransferases (PKMT) are a structurally unique class of enzymes that catalyze the specific methylation of lysine residues in a number of different substrates. ...SET domain protein lysine methyltransferases (PKMT) are a structurally unique class of enzymes that catalyze the specific methylation of lysine residues in a number of different substrates. Especially histone-specific SET domain PKMTs have received widespread attention because of their roles in the regulation of epigenetic gene expression and the development of some cancers. Rubisco large subunit methyltransferase (RLSMT) is a chloroplast-localized SET domain PKMT responsible for the formation of trimethyl-lysine-14 in the large subunit of Rubisco, an essential photosynthetic enzyme. Here, we have used cryoelectron microscopy to produce an 11-A density map of the Rubisco-RLSMT complex. The atomic model of the complex, obtained by fitting crystal structures of Rubisco and RLSMT into the density map, shows that the extensive contact regions between the 2 proteins are mainly mediated by hydrophobic residues and leucine-rich repeats. It further provides insights into potential conformational changes that may occur during substrate binding and catalysis. This study presents the first structural analysis of a SET domain PKMT in complex with its intact polypeptide substrate. |
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手法 | EM (単粒子) |
解像度 | 11.0 - 12.0 Å |
構造データ | ![]() EMDB-1734: ![]() EMDB-1735: |
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