BMRB: 5113

High-resolution Structures for the Psi-conotoxins Indicate Differences in Disulfide Bridge Dynamics

Authors

Van Wagoner, R.M., Ireland, C.M.

Assembly

PSI-CONOTOXIN PIIIE

Entity

1. PSI-CONOTOXIN PIIIE (polymer, Thiol state: all disulfide bound), 24 monomers, 2724.155 Da Detail

HXXCCLYGKC RRYXGCSSAS CCQX

Formula weight

2724.155 Da

Entity Connection

disulfide 3 Detail

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ID	Type	Value order	Atom ID 1	Atom ID 2
1	disulfide	sing	1:CYS4:SG	1:CYS16:SG
2	disulfide	sing	1:CYS5:SG	1:CYS21:SG
3	disulfide	sing	1:CYS10:SG	1:CYS22:SG

Source organism

Conus purpurascens

Exptl. method

NMR

Refine. method

distance geometry

Data set

assigned_chemical_shifts

Chem. Shift Complete

Sequence coverage: 83.3 %, Completeness: 99.1 %, Completeness (bb): 97.6 % Detail

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Polymer type: polypeptide(L)

	Total	1H
All	99.1 % (109 of 110)	99.1 % (109 of 110)
Backbone	97.6 % (41 of 42)	97.6 % (41 of 42)
Sidechain	100.0 % (68 of 68)	100.0 % (68 of 68)
Aromatic	100.0 % (10 of 10)	100.0 % (10 of 10)
Methyl	100.0 % (3 of 3)	100.0 % (3 of 3)

1. psi-conotoxin

HXXCCLYGKC RRYXGCSSAS CCQX

Show sample condition

Sample

Pressure 1 atm, Temperature 277 K, pH 3.48, Details The cysteine used was 13C-labeled only at position 3 (i.e. the beta carbon).

#	Name	Isotope labeling	Type	Concentration
1	psi-conotoxin	[U-13CB]-Cys4,Cys21		16 mM
2	TFA			16 mM
3	H2O			90 %
4	D2O			10 %

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Protein Blocks Logo

Calculated from 13 models in PDB: 1JLO, Strand ID: A Detail

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Release date

2001-08-14

Citation

An improved solution structure for psi-conotoxin PiiiE
Van Wagoner, R.M., Ireland, C.M.
Biochemistry (2003), 42, 6347-6352, PubMed 12767215 , DOI 10.1021/bi027274e , Abstract

Entries sharing articles BMRB: 1, Swiss-Prot: 1 entries Detail

Related entities 1. PSI-CONOTOXIN PIIIE, : 1 : 1 : 3 entities Detail

Experiments performed 4 experiments Detail