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-Structure paper
タイトル | Structural and Functional Insights into the Evolution and Stress Adaptation of Type II Chaperonins. |
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ジャーナル・号・ページ | Structure, Vol. 24, Issue 3, Page 364-374, Year 2016 |
掲載日 | 2016年3月1日 |
![]() | Jessica J Chaston / Callum Smits / David Aragão / Andrew S W Wong / Bilal Ahsan / Sara Sandin / Sudheer K Molugu / Sanjay K Molugu / Ricardo A Bernal / Daniela Stock / Alastair G Stewart / ![]() ![]() ![]() |
PubMed 要旨 | Chaperonins are essential biological complexes assisting protein folding in all kingdoms of life. Whereas homooligomeric bacterial GroEL binds hydrophobic substrates non-specifically, the ...Chaperonins are essential biological complexes assisting protein folding in all kingdoms of life. Whereas homooligomeric bacterial GroEL binds hydrophobic substrates non-specifically, the heterooligomeric eukaryotic CCT binds specifically to distinct classes of substrates. Sulfolobales, which survive in a wide range of temperatures, have evolved three different chaperonin subunits (α, β, γ) that form three distinct complexes tailored for different substrate classes at cold, normal, and elevated temperatures. The larger octadecameric β complexes cater for substrates under heat stress, whereas smaller hexadecameric αβ complexes prevail under normal conditions. The cold-shock complex contains all three subunits, consistent with greater substrate specificity. Structural analysis using crystallography and electron microscopy reveals the geometry of these complexes and shows a novel arrangement of the α and β subunits in the hexadecamer enabling incorporation of the γ subunit. |
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手法 | EM (単粒子) / X線回折 |
解像度 | 3.0023 - 16.0 Å |
構造データ | ![]() EMDB-6291: ![]() PDB-4xcd: ![]() PDB-4xcg: ![]() PDB-4xci: |
化合物 | ![]() ChemComp-ADP: |
由来 |
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![]() | CHAPERONE / Protein Folding / Thermosomes / Chaperonin |