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1bom

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Revision as of 08:35, 21 May 2019

THREE-DIMENSIONAL STRUCTURE OF BOMBYXIN-II, AN INSULIN-RELATED BRAIN-SECRETORY PEPTIDE OF THE SILKMOTH BOMBYX MORI: COMPARISON WITH INSULIN AND RELAXIN

Structural highlights

1bom is a 2 chain structure. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
NonStd Res:
Related:	1bon
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[BXA2_BOMMO] Brain peptide responsible for activation of prothoracic glands to produce ecdysone in insects. [BXA6_BOMMO] Brain peptide responsible for activation of prothoracic glands to produce ecdysone in insects.

Publication Abstract from PubMed

The three-dimensional solution structure of bombyxin-II, an insulin-like two-chain peptide produced by the brain of the silkworm Bombyx mori, has been determined by simulated annealing calculations based on 535 distance constraints and 24 torsion-angle constraints derived from NMR data and three distance constraints of the disulfide bonds. To our knowledge, this is the first three-dimensional structure determined for an invertebrate insulin-related peptide. The root-mean-square deviations between the best 10 structures and the mean structure are 0.58(+/- 0.15) A for the backbone heavy atoms (N, C alpha, C) and 1.03(+/- 0.18) A for all non-hydrogen atom if less well-defined N and C termini (A1, A20, B(-2) to B4 and B23 to B25) are excluded. The overall main-chain structure of bombyxin-II is similar to that of insulin. However, there are significant conformational and functional differences in their B-chain C-terminal parts. The B-chain C-terminal part of bombyxin-II adopts an extension of the B-chain central helix like that of relaxin and is not required for bombyxin activity, while the corresponding part of insulin adopts a sharp turn and a beta-strand and is essential for insulin activity. This structure demonstrates that bombyxin-II is more closely related to relaxin than to insulin, and suggests that insulin might have evolved the additional receptor-recognition site in the B-chain C-terminal beta-strand to distinguish itself from bombyxin and relaxin. The structure of bombyxin-II thus provides novel insights into the receptor recognition and divergent molecular evolution of insulin-superfamily peptides.

Three-dimensional solution structure of bombyxin-II an insulin-like peptide of the silkmoth Bombyx mori: structural comparison with insulin and relaxin.,Nagata K, Hatanaka H, Kohda D, Kataoka H, Nagasawa H, Isogai A, Ishizaki H, Suzuki A, Inagaki F J Mol Biol. 1995 Nov 10;253(5):749-58. PMID:7473749^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Nagata K, Hatanaka H, Kohda D, Kataoka H, Nagasawa H, Isogai A, Ishizaki H, Suzuki A, Inagaki F. Three-dimensional solution structure of bombyxin-II an insulin-like peptide of the silkmoth Bombyx mori: structural comparison with insulin and relaxin. J Mol Biol. 1995 Nov 10;253(5):749-58. PMID:7473749 doi:http://dx.doi.org/S0022-2836(85)70588-8

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1bom"

@@ Line 1: / Line 1: @@
 ==THREE-DIMENSIONAL STRUCTURE OF BOMBYXIN-II, AN INSULIN-RELATED BRAIN-SECRETORY PEPTIDE OF THE SILKMOTH BOMBYX MORI: COMPARISON WITH INSULIN AND RELAXIN==
-<StructureSection load='1bom' size='340' side='right' caption='[[1bom]], [[NMR_Ensembles_of_Models | 1 NMR models]]' scene=''>
+<StructureSection load='1bom' size='340' side='right'caption='[[1bom]], [[NMR_Ensembles_of_Models | 1 NMR models]]' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1bom]] is a 2 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BOM OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1BOM FirstGlance]. <br>
@@ Line 23: / Line 23: @@
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: Hatanaka, H]]
 [[Category: Inagaki, F]]

1bom

From Proteopedia

Revision as of 08:35, 21 May 2019

THREE-DIMENSIONAL STRUCTURE OF BOMBYXIN-II, AN INSULIN-RELATED BRAIN-SECRETORY PEPTIDE OF THE SILKMOTH BOMBYX MORI: COMPARISON WITH INSULIN AND RELAXIN

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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