Molecular cloning and sequence analysis of two porcine seminal proteins, PSP-I and PSP-II: new members of the spermadhesin family.
Two full-length cDNAs encoding porcine seminal proteins, PSP-I and PSP-II, have been isolated from a porcine seminal vesicle cDNA library. Nucleotide sequence analysis of the 706-bp PSP-I cDNA predicts a precursor protein of 133 amino acid residues, which includes a 21-residue signal peptide and a 112-residue secreted protein. On the other hand, the complete sequence of the 686-bp PSP-II cDNA reveals a coding sequence for a 21-residue signal peptide and a 116-residue secreted protein. The predicted amino acid sequences agree very well with those determined by conventional amino acid sequence analysis. Alignment of the two cDNA sequences shows an overall 66% sequence homology throughout their entire length. However, the sequence homology is much higher in the 3' untranslated region (72%) than in the coding region (61%). This suggests that these two genes evolved by duplication and divergence from a common ancestral gene. They share about 50% amino acid sequence homology and a similar overall structure with three members of the spermadhesin family.
Kwok
S C
SC
Department of Obstetrics and Gynecology, Albert Einstein Medical Center, Philadelphia, PA 19141.
Yang
D
D
Dai
G
G
Soares
M J
MJ
Chen
S
S
McMurtry
J P
JP
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D006023:Glycoproteins / Q000235:genetics*; D008969:Molecular Sequence Data; D011498:Protein Precursors / Q000235:genetics; D029607:Seminal Vesicle Secretory Proteins; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid; D013552:Swine
D006023:Glycoproteins; D011498:Protein Precursors; D029607:Seminal Vesicle Secretory Proteins; C074521:seminal vesicle secretory protein II, porcine; C074520:seminal vesicle secretory protein 109, porcine