The invention relates to a composition of polypeptides, characterized in that
it contains at least one protein or part of a protein selected from the sequences
of amino acids identified in the list of the sequences as SEQ ID NO 1 (VanH), SEQ
ID NO 2 (VanA). SEQ ID NO 3 (VanX) or SEQ ID NO 19 (VanC), or any protein or part
of a protein recognized by the antibodies directed against VanH, VanA, VanX or
VanC, or any protein or part of a protein encoded in a sequence hybridizing with
one of the nucleotide sequences identified in the list of the sequences as SEQ
ID NO 8, SEQ ID NO 9 or SEQ ID NO 10 or with one of the following sequences V1
or V2 under stringent or only slightly stringent conditions:
V1 : GGX GAA GAT GGX TCX TTX CAA GGX
G C AG C G
A
V2 : AAT ACX ATX CCX GGX TTT AC
C T C
C
The invention also relates to the nucleotide sequences coding for these polypeptides
as well as their utilization for the diagnosis of resistance to the glycopeptides.