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Taxonomic group: fungi / Ascomycota (Phylum: Ascomycota)
Host organism: (Poaceae)
Associated disease: Fusarium head blight

The structure was elucidated in this paper
NCBI PubMed ID: 21365681
Publication DOI: 10.1002/prot.22981
Journal NLM ID: 8700181
Publisher: New York, NY: Wiley-Liss
Correspondence: Gronenborn AM <amg100

pitt.edu>
Institutions: Department of Structural Biology, University of Pittsburgh School of Medicine, Pittsburgh, USA, Laboratory of Chemical Physics, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, USA

Members of the cyanovirin-N homolog (CVNH) lectin family are found in bacteria, fungi and plants. As part of our ongoing work on CVNH structure-function studies, we determined the high-resolution NMR solution structure of the homolog from the wheat head blight disease causing ascomycetous fungus Gibberella zeae (or Fusarium graminearum), hereafter called GzCVNH. Like cyanovirin-N (CV-N), GzCVNH comprises two tandem sequence repeats and the protein sequence exhibits 30% identity with CV-N. The overall structure is similar to those of other members of the CVNH family, with the conserved pseudo-symmetric halves of the structure, domains A and B, closely resembling recently determined structures of Tuber borchii, Neurospora crassa, and Ceratopteris richardii CVNH proteins. Although GzCVNH exhibits a similar glycan recognition profile to CV-N and specifically binds to Manα(1-2)Manα, its weak carbohydrate binding affinity to only one binding site is insufficient for conferring anti-HIV activity.

lectin, NMR solution structure, CVNH, antiviral protein, HIV

Structure type: oligomer
Location inside paper: fig. 3a (second structure on central colum)
Aglycon: (->4) Asn (protein)
Compound class: N-glycan
Contained glycoepitopes: IEDB_123886,IEDB_130701,IEDB_135813,IEDB_137340,IEDB_137485,IEDB_140116,IEDB_141793,IEDB_141807,IEDB_141828,IEDB_144983,IEDB_151079,IEDB_151531,IEDB_152206,IEDB_153212,IEDB_153220,IEDB_164174,IEDB_187201,IEDB_429156,IEDB_548907,IEDB_857734,IEDB_983930,SB_197,SB_198,SB_33,SB_44,SB_67,SB_72,SB_73,SB_74,SB_77,SB_85

Methods: 13C NMR, 1H NMR, biological assays, GPC, TOCSY, NOESY, HSQC, fluorophore labeling
Biological activity: For this structure was detected anti-HIV activity that is due to the high mannose sugars.
Comments, role: This structure is a one of glycan array screening of GzCVNH.

Related record ID(s): 43640, 43649, 43654, 45546, 45547, 45549, 45550, 45551, 45569
NCBI Taxonomy refs (TaxIDs): 5518
Reference(s) to other database(s): GTC:G55220VL
Show glycosyltransferases

There is only one chemically distinct structure:

CC(=O)N[C@H]1[C@H](O[C@@H]2[C@@H](CO)O[C@@H](O)[C@H](NC(C)=O)[C@H]2O)O[C@H](CO)[C@@H](O[C@@H]2O[C@H](CO[C@H]3O[C@H](CO[C@H]4O[C@H](CO)[C@@H](O)[C@H](O)[C@@H]4O)[C@@H](O)[C@H](O[C@H]4O[C@H](CO)[C@@H](O)[C@H](O)[C@@H]4O)[C@@H]3O)[C@@H](O)[C@H](O[C@H]3O[C@H](CO)[C@@H](O)[C@H](O)[C@@H]3O)[C@@H]2O)[C@@H]1O

SVG MW SMILES 3D mol Ionize