1887

Abstract

Summary: The nucleotide (nt) sequence of a DNA segment containing the majority of a gene cloned from DSIR517 encoding a 130 kDa insecticidal crystal protein has been determined. Sequence analysis reveals an open reading frame (ORF) of 3453 nt. The ATG initiation codon, which is preceded by a potential ribosome-binding site sequence, was confirmed by N-terminal amino acid sequencing. The ORF extends beyond the 3” terminus of the cloned fragment; however, the high degree of homology between the deduced amino acid sequence of this ORF and other Cry proteins suggests the clone lacks only five C-terminal amino acids. Making this assumption, the ORF of 3468 nt encodes a protein of 1156 amino acids with an estimated molecular mass of 129700 Da. Analysis of the deduced amino acid sequence reveals a number of features characteristic of Cry proteins. Alignment of the Cry 517 protein sequence with other Cry proteins suggests it is most closely related to the genes but sufficiently different to form a new gene subclass.

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/content/journal/micro/10.1099/00221287-138-1-55
1992-01-01
2021-10-27
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