Abstract
Sialidase (EC 3.2.1.18) catalyzes the release of sialic acid from sialo-oligosaccharides, gangliosides, or sialo-glycoproteins. In this investigation, we cloned a novel cDNA for mouse brain sialidase and expressed the cDNA in COS-7 cells. This 1699 bp cDNA codes for a 41.6 kDa protein consisting of 372 deduced amino acid residues. In COS-7 cells transiently transfected with the cDNA, a 250-fold increase was observed in specific activity toward 2'-(4-methylumbelliferyl)-α-D-N-acetylneuraminic acid. Similarity searches of the nonredundant GenBank peptide sequence database by the PSI-BLAST program identified rat, hamster, human, and bacterial sialidases homologous to this mouse brain sialidase. Amino acid sequence identities to rat and hamster sialidases (84% and 77%, respectively) suggest that this form of sialidase is conserved in rodents. Sequence identities to human and mouse lysosomal sialidases (30% and 28%, respectively) indicate that the mouse brain sialidase is distinct from the lysosomal enzyme. Mouse brain sialidase has two amino acid sequence motifs common to bacterial sialidases: the 'F/YRIP' motif and the 'Asp-box' motif. The 'F/YRIP' motif is present near the N terminus while two 'Asp-box' motifs are present downstream.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 727-731 |
| Number of pages | 5 |
| Journal | Biochemical and Biophysical Research Communications |
| Volume | 258 |
| Issue number | 3 |
| DOIs | |
| State | Published - May 19 1999 |
| Externally published | Yes |
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Keywords
- Sialidase
- cDNA expression
- cDNA sequence
ASJC Scopus subject areas
- Biophysics
- Biochemistry
- Molecular Biology
- Cell Biology
Cite this
Molecular cloning and expression of mouse brain sialidase. / Fronda, Christian L.; Zeng, Guichao; Gao, Luoyi; Yu, Robert K.
In: Biochemical and Biophysical Research Communications, Vol. 258, No. 3, 19.05.1999, p. 727-731.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Molecular cloning and expression of mouse brain sialidase
AU - Fronda, Christian L.
AU - Zeng, Guichao
AU - Gao, Luoyi
AU - Yu, Robert K
PY - 1999/5/19
Y1 - 1999/5/19
N2 - Sialidase (EC 3.2.1.18) catalyzes the release of sialic acid from sialo-oligosaccharides, gangliosides, or sialo-glycoproteins. In this investigation, we cloned a novel cDNA for mouse brain sialidase and expressed the cDNA in COS-7 cells. This 1699 bp cDNA codes for a 41.6 kDa protein consisting of 372 deduced amino acid residues. In COS-7 cells transiently transfected with the cDNA, a 250-fold increase was observed in specific activity toward 2'-(4-methylumbelliferyl)-α-D-N-acetylneuraminic acid. Similarity searches of the nonredundant GenBank peptide sequence database by the PSI-BLAST program identified rat, hamster, human, and bacterial sialidases homologous to this mouse brain sialidase. Amino acid sequence identities to rat and hamster sialidases (84% and 77%, respectively) suggest that this form of sialidase is conserved in rodents. Sequence identities to human and mouse lysosomal sialidases (30% and 28%, respectively) indicate that the mouse brain sialidase is distinct from the lysosomal enzyme. Mouse brain sialidase has two amino acid sequence motifs common to bacterial sialidases: the 'F/YRIP' motif and the 'Asp-box' motif. The 'F/YRIP' motif is present near the N terminus while two 'Asp-box' motifs are present downstream.
AB - Sialidase (EC 3.2.1.18) catalyzes the release of sialic acid from sialo-oligosaccharides, gangliosides, or sialo-glycoproteins. In this investigation, we cloned a novel cDNA for mouse brain sialidase and expressed the cDNA in COS-7 cells. This 1699 bp cDNA codes for a 41.6 kDa protein consisting of 372 deduced amino acid residues. In COS-7 cells transiently transfected with the cDNA, a 250-fold increase was observed in specific activity toward 2'-(4-methylumbelliferyl)-α-D-N-acetylneuraminic acid. Similarity searches of the nonredundant GenBank peptide sequence database by the PSI-BLAST program identified rat, hamster, human, and bacterial sialidases homologous to this mouse brain sialidase. Amino acid sequence identities to rat and hamster sialidases (84% and 77%, respectively) suggest that this form of sialidase is conserved in rodents. Sequence identities to human and mouse lysosomal sialidases (30% and 28%, respectively) indicate that the mouse brain sialidase is distinct from the lysosomal enzyme. Mouse brain sialidase has two amino acid sequence motifs common to bacterial sialidases: the 'F/YRIP' motif and the 'Asp-box' motif. The 'F/YRIP' motif is present near the N terminus while two 'Asp-box' motifs are present downstream.
KW - Sialidase
KW - cDNA expression
KW - cDNA sequence
UR - http://www.scopus.com/inward/record.url?scp=0033583801&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033583801&partnerID=8YFLogxK
U2 - 10.1006/bbrc.1999.0698
DO - 10.1006/bbrc.1999.0698
M3 - Article
VL - 258
SP - 727
EP - 731
JO - Biochemical and Biophysical Research Communications
JF - Biochemical and Biophysical Research Communications
SN - 0006-291X
IS - 3
ER -