H NMR study of the solution structure of Ac-AMP2, a sugar binding antimicrobial protein isolated from Amaranthus caudatus.Martins, J.C., Maes, D., Loris, R., Pepermans, H.A., Wyns, L., Willem, R., Verheyden, P.
(1996) J.Mol.Biol. 258: 322-333
- PubMed: 8627629
- Also Cited By: 1ZNT, 1ZUV, 1ZWU
- PubMed Abstract:
- 1H NMR Study of the Interaction of N,N',N''-Triacetyl Chitotriose with Ac-AMP2, a Sugar Binding Antimicrobial Protein Isolated from Amaranthus Caudatus
Verheyden, P.,Pletinckx, J.,Maes, D.,Pepermans, H.A.M.,Wyns, L.,Willem, R.,Martins, J.C.
(1995) FEBS Lett. 370: 245
- Antimicrobial Peptides from Amaranthus Caudatus Seeds with Sequence Homology to the Cysteine(Slash)Glycine Rich Domain of Chitin-Binding Proteins
Broekaert, W.F.,Marien, W.,Terras, F.R.G.,De Bolle, M.F.C.,Proost, P.,Van Damme, J.,Dillen, L.,Claeys, M.,Rees, S.B.,Vanderleyden, J.,Cammue, B.P.A.
(1992) Biochemistry 31: 4308
The conformation in water of antimicrobial protein 2 from Amaranthus caudatus (Ac-AMP2) was determined using 1H NMR, DIANA and restrained molecular modeling. Ac-AMP2 is a 30 amino acid residue, lectin-like protein that specifically binds to chitin, a ...
The conformation in water of antimicrobial protein 2 from Amaranthus caudatus (Ac-AMP2) was determined using 1H NMR, DIANA and restrained molecular modeling. Ac-AMP2 is a 30 amino acid residue, lectin-like protein that specifically binds to chitin, a polymer of beta-1,4-N-acetyl-D-glucosamine. After sequence specific resonance assignments, a total of 198 distance restraints were collected from 2D NOESY buildup spectra at 500 MHz at pH 2, supplemented by a 2D NOESY spectrum at 600 MHz. The location of the three previously unassigned disulfide bridges was determined from preliminary DIANA structures, using a statistical analysis of intercystinyl distances. The solution structure of Ac-AMP2 is presented as a set of 26 DIANA structures, further refined by restrained molecular dynamics using a simulated annealing protocol in the AMBER force field, with a backbone r.m.s.d. for the well defined Glu3-Cys28 segment of 0.69(+/-0.12) angstroms. The main structural element is an antiparallel beta-sheet from Met13 to Lys23 including a betaI-turn over Gln17-Phel8 with a beta bulge at Gly19. In addition, a beta'I turn over Arg6-Gly7, a beta'III turn over Ser11-Gly12 and a helical turn from Gly24 to Cys28 are identified. This structure is very similar to the equivalent regions of the X-ray structure of wheat germ agglutinin and the NMR structure of hevein.
High Resolution NMR Centre, Vrije Universiteit Brussel, Belgium.