Seminalplasmin and caltrin are the same protein

Area of Science:

• Biochemistry
• Molecular Biology
• Reproductive Biology

Background:

• Seminalplasmin is a basic protein found in bovine seminal plasma.
• It exhibits antimicrobial and transcription-inhibitory properties.
• Previous reports on its sequence showed minor discrepancies.

Purpose of the Study:

• To determine the precise amino acid sequence of seminalplasmin.
• To compare the determined sequence with previously reported sequences.
• To clarify the identity of seminalplasmin and caltrin.

Main Methods:

• Automated protein sequencing was employed.
• The amino acid sequence of seminalplasmin was elucidated.

Main Results:

• The determined sequence of seminalplasmin was established.
• This sequence differed slightly from a prior report.
• The sequence was found to be identical to that of caltrin.

Conclusions:

• Seminalplasmin and caltrin are the same protein.
• This finding resolves previous discrepancies in protein identification.
• The identical nature of these proteins has implications for understanding their function in bovine seminal plasma.