Fj. Ghadessy et al., A GENOMIC REGION ENCODING STONEFISH (SYNANCEJA-HORRIDA) STONUSTOXIN BETA-SUBUNIT CONTAINS AN INTRON, Toxicon, 32(12), 1994, pp. 1684-1688
The polymerase chain reaction (PCR) has been used to amplify a 1899 ba
se pair fragment from stonefish genomic DNA. A comparison of the trans
lated nucleotide sequence of this product with the separately determin
ed N-terminal amino acid sequence of the beta-subunit reveals the pres
ence of a 416 bp intron at Gly 18. The nucleotide sequence following t
his intron encodes 476 amino acids whose sequence showed no homology t
o other known toxins. This region, however, contained amino acid seque
nces identical to internal peptide sequences determined separately fro
m the toxin's beta-subunit.