Sandbox Reserved 711: Difference between revisions
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== Description of the structure == | == Description of the structure == | ||
The endopolygalacturonase II from Aspergillus niger has a beta-helix structure: the chain folds into 10 turns, shaping the faces of a right-handed helix consisting in 4 parallel beta-sheets - PB1, PB2a, PB2b and PB3 - separated by loops. The helix is closed at its N-terminal end by a small alpha-helix. | The endopolygalacturonase II from Aspergillus niger has a beta-helix structure<ref>http://www.ncbi.nlm.nih.gov/pubmed/10521427</ref>: the chain folds into 10 turns, shaping the faces of a right-handed helix consisting in 4 parallel beta-sheets - PB1, PB2a, PB2b and PB3 - separated by loops. The helix is closed at its N-terminal end by a small alpha-helix. | ||
4 disulfide bridges, conserved in all endopolygalacturonases of ''A. Niger'', hold together different parts of the chain, and particularily one of these attaches the N-terminal helix to the PB2b sheet. | 4 disulfide bridges, conserved in all endopolygalacturonases of ''A. Niger'', hold together different parts of the chain, and particularily one of these attaches the N-terminal helix to the PB2b sheet. | ||