Enzymes
| UniProtKB help_outline | 3 proteins |
Reaction participants Show >> << Hide
- Name help_outline a ganglioside GT1b Identifier CHEBI:82940 Charge -3 Formula C63H98N5O47R2 SMILEShelp_outline CC(=O)N[C@@H]1[C@@H](O)C[C@@](O[C@H](CO)[C@@H](O)[C@@H]2O[C@@](C[C@H](O)[C@H]2NC(C)=O)(O[C@@H]2[C@@H](O)[C@H](O[C@H]3[C@H](O)[C@@H](O)[C@H](OC[C@H](NC([*])=O)[C@H](O)[*])O[C@@H]3CO)O[C@H](CO)[C@@H]2O[C@@H]2O[C@H](CO)[C@H](O)[C@H](O[C@@H]3O[C@H](CO)[C@H](O)[C@H](O[C@@]4(C[C@H](O)[C@@H](NC(C)=O)[C@@H](O4)[C@H](O)[C@H](O)CO)C([O-])=O)[C@H]3O)[C@H]2NC(C)=O)C([O-])=O)(O[C@H]1[C@H](O)[C@H](O)CO)C([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 10 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline CMP-N-acetyl-β-neuraminate Identifier CHEBI:57812 (Beilstein: 5899715) help_outline Charge -2 Formula C20H29N4O16P InChIKeyhelp_outline TXCIAUNLDRJGJZ-BILDWYJOSA-L SMILEShelp_outline [H][C@]1(O[C@](C[C@H](O)[C@H]1NC(C)=O)(OP([O-])(=O)OC[C@H]1O[C@H]([C@H](O)[C@@H]1O)n1ccc(N)nc1=O)C([O-])=O)[C@H](O)[C@H](O)CO 2D coordinates Mol file for the small molecule Search links Involved in 72 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline a ganglioside GQ1b Identifier CHEBI:90862 Charge -4 Formula C74H114N6O55R2 SMILEShelp_outline [C@@]1(O[C@H]2[C@H]([C@H](O[C@H]([C@@H]2O)O[C@@H]3[C@H](O[C@@H](OC[C@@H]([C@@H](*)O)NC(=O)*)[C@@H]([C@H]3O)O)CO)CO)O[C@H]4[C@@H]([C@H]([C@@H](O)[C@H](O4)CO)O[C@H]5[C@@H]([C@@H](O[C@]6(O[C@]([C@@H]([C@H](C6)O)NC(C)=O)([C@@H]([C@H](O[C@]7(O[C@]([C@@H]([C@H](C7)O)NC(C)=O)([C@@H]([C@@H](CO)O)O)[H])C(=O)[O-])CO)O)[H])C([O-])=O)[C@H]([C@H](O5)CO)O)O)NC(C)=O)(O[C@]([C@H](NC(=O)C)[C@H](C1)O)([C@@H]([C@H](O[C@]8(O[C@]([C@@H]([C@H](C8)O)NC(C)=O)([C@@H]([C@@H](CO)O)O)[H])C([O-])=O)CO)O)[H])C([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 4 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline CMP Identifier CHEBI:60377 Charge -2 Formula C9H12N3O8P InChIKeyhelp_outline IERHLVCPSMICTF-XVFCMESISA-L SMILEShelp_outline Nc1ccn([C@@H]2O[C@H](COP([O-])([O-])=O)[C@@H](O)[C@H]2O)c(=O)n1 2D coordinates Mol file for the small molecule Search links Involved in 151 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H+ Identifier CHEBI:15378 Charge 1 Formula H InChIKeyhelp_outline GPRLSGONYQIRFK-UHFFFAOYSA-N SMILEShelp_outline [H+] 2D coordinates Mol file for the small molecule Search links Involved in 9,176 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:48932 | RHEA:48933 | RHEA:48934 | RHEA:48935 | |
|---|---|---|---|---|
| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
| UniProtKB help_outline |
|
Related reactions help_outline
Specific form(s) of this reaction
More general form(s) of this reaction
Publications
-
Acceptor substrate specificity of a cloned GD3 synthase that catalyzes the biosynthesis of both GD3 and GD1c/GT1a/GQ1b.
Nara K., Watanabe Y., Kawashima I., Tai T., Nagai Y., Sanai Y.
To address the role of alpha2,8-sialyltransferase (GD3 synthase) in the biosynthesis of gangliosides, we examined the substrate specificity of the enzyme. In the ganglioside synthesis pathway, it has been generally accepted that sialyltransferase II (SAT II) catalyzes the production of GD3 from GM ... >> More
To address the role of alpha2,8-sialyltransferase (GD3 synthase) in the biosynthesis of gangliosides, we examined the substrate specificity of the enzyme. In the ganglioside synthesis pathway, it has been generally accepted that sialyltransferase II (SAT II) catalyzes the production of GD3 from GM3, and sialyltransferase V (SAT V) catalyzes the production of GD1c/GT1a/GQ1b from GM1h/GD1a/GT1b. However, acceptor specificity of the clones GD3 synthase that was isolated from human melanoma cells [Nara, K., Watanabe, Y., Maruyama, K., Kasahara, K., Nagai. Y. & Sanai, Y. (1994) Proc. Natl Acad. Sci. USA 91, 7952-7956] has revealed that this enzyme utilized the gangliosides containing the terminal Sia(alpha2-3)Gas structure of the carbohydrate moiety, which includes GM3, GM1b, GD1a and GT1B as exogenous substrates. Kinetic data also showed that the enzyme was able to utilize both GM3 and GM1b/GD1a/GT1b as acceptor substrates. These data indicate that the enzyme catalyzes the formation of not only GD3 but also GD1c, GT1a, and GQ1B in vitro. Furthermore, by transfection of the cloned human alpha2,8-sialyltransferase cDNA, transient and stable expression of GT1a and GQ1b wa also observed in COS-7 cells and Swiss 3T3 cells that originally lacked SAT II and SAT V activities. These observations indicate that the enzyme has both SAT II and SAT V activities in vivo. << Less
Eur. J. Biochem. 238:647-652(1996) [PubMed] [EuropePMC]
This publication is cited by 5 other entries.
-
Molecular cloning and expression of a fifth type of alpha2,8-sialyltransferase (ST8Sia V). Its substrate specificity is similar to that of SAT-V/III, which synthesize GD1c, GT1a, GQ1b and GT3.
Kono M., Yoshida Y., Kojima N., Tsuji S.
The cDNAs encoding a new alpha2,8-sialyltransferase (ST8Sia V) were cloned from a mouse brain cDNA library by means of a polymerase chain reaction-based method using the nucleotide sequence information on mouse ST8Sia I (GD3 synthase) and mouse ST8Sia III (Siaalpha2,3Galbeta1,4GlcNAcalpha2,8-sialy ... >> More
The cDNAs encoding a new alpha2,8-sialyltransferase (ST8Sia V) were cloned from a mouse brain cDNA library by means of a polymerase chain reaction-based method using the nucleotide sequence information on mouse ST8Sia I (GD3 synthase) and mouse ST8Sia III (Siaalpha2,3Galbeta1,4GlcNAcalpha2,8-sialyltransferase ), both of which exhibit activity toward glycolipids. The predicted amino acid sequence of ST8Sia V shows 36.1% and 15.0% identity to those of mouse ST8Sia I and III, respectively. The recombinant protein A-fused ST8Sia V expressed in COS-7 cells exhibited an alpha2, 8-sialyltransferase activity toward GM1b, GD1a, GT1b, and GD3, and synthesized GD1c, GT1a, GQ1b, and GT3, respectively. The apparent Km values for GM1b, GD1a, GT1b and GD3 were 1.1, 0.082, 0.070, and 0.28 mM, respectively. However, ST8Sia V did not exhibit activity toward GM3. Thus, the substrate specificity of ST8Sia V is different from those of ST8Sia I and III, both of which exhibit activity toward GM3. Transfection of the ST8Sia V gene into COS-7 cells, which express GD1a as a major glycolipid, led to the expression of determinants for monoclonal antibody 4F10, which recognizes GT1a and GQ1b, suggesting that ST8Sia V exhibits activity toward gangliosides GD1a and/or GT1b in vivo. The expression of the ST8Sia V gene was tissue- and developmental stage-specific, and was clearly different from those of other alpha2,8-sialyltransferase genes. The ST8Sia V gene was strongly expressed in the brain and weakly in other tissues such as the liver. In addition, its expression was greater in the adult than fetal brain. These results strongly indicate that ST8Sia V is a candidate for SAT-V, the alpha2,8-sialyltransferase involved in GD1c, GT1a, GQ1b, and GT3 synthesis. << Less
J. Biol. Chem. 271:29366-29371(1996) [PubMed] [EuropePMC]
This publication is cited by 4 other entries.
-
Molecular cloning and expression of a sixth type of alpha 2,8-sialyltransferase (ST8Sia VI) that sialylates O-glycans.
Takashima S., Ishida H.K., Inazu T., Ando T., Ishida H., Kiso M., Tsuji S., Tsujimoto M.
A novel member of the mouse alpha2,8-sialyltransferase (ST8Sia) family, designated ST8Sia VI, was identified by BLAST analysis of expressed sequence tags. The sequence of ST8Sia VI encodes a protein of 398 amino acids and shows 42.0 and 38.3% amino acid sequence identities to mouse alpha2,8-sialyl ... >> More
A novel member of the mouse alpha2,8-sialyltransferase (ST8Sia) family, designated ST8Sia VI, was identified by BLAST analysis of expressed sequence tags. The sequence of ST8Sia VI encodes a protein of 398 amino acids and shows 42.0 and 38.3% amino acid sequence identities to mouse alpha2,8-sialyltransferases ST8Sia I (GD3 synthase) and ST8Sia V (GD1c, GT1a, GQ1b, and GT3 synthases), respectively. The recombinant soluble form of ST8Sia VI expressed in COS-7 cells exhibited alpha2,8-sialyltransferase activity toward both glycolipids and glycoproteins that have the NeuAcalpha2,3(6)Gal sequence at the nonreducing end of their carbohydrate groups. This enzyme formed NeuAcalpha2,8NeuAc structures, but not oligosialic or polysialic acid structures. Analysis of the fetuin sialylated by ST8Sia VI indicated that ST8Sia VI prefers O-glycans to N-glycans as acceptor substrates. Substrate specificities and kinetic properties also showed that ST8Sia VI prefers O-glycans to glycolipids as acceptor substrates. ST8Sia VI also exhibited activity toward oligosaccharides such as sialyllactose and sialyllactosamine, and the structure of the minimal acceptor substrate for ST8Sia VI was determined as the NeuAcalpha2,3(6)Gal sequence. The expression of the ST8Sia VI gene was ubiquitous, and the highest expression was observed in kidney, with three major transcripts of 8.2, 3.8, and 2.7 kb. This is the first report of a mammalian alpha2,8-sialyltransferase that sialylates O-glycans preferentially. << Less
J. Biol. Chem. 277:24030-24038(2002) [PubMed] [EuropePMC]
This publication is cited by 5 other entries.
-
Molecular cloning and expression of human alpha2,8-sialyltransferase (hST8Sia V).
Kim Y.-J., Kim K.-S., Do S.-I., Kim C.-H., Kim S.-K., Lee Y.-C.
The cDNA encoding human alpha2,8-sialyltransferase (hST8Sia V) which exhibits activity toward gangliosides, GM1b, GD1a, GT1b, and GD3, was isolated by screening of human brain cDNA library with a DNA probe generated from the cDNA sequence of mouse ST8Sia V (mST8Sia V) and by 5'-RACE of mRNA from h ... >> More
The cDNA encoding human alpha2,8-sialyltransferase (hST8Sia V) which exhibits activity toward gangliosides, GM1b, GD1a, GT1b, and GD3, was isolated by screening of human brain cDNA library with a DNA probe generated from the cDNA sequence of mouse ST8Sia V (mST8Sia V) and by 5'-RACE of mRNA from human brain tissue. Comparative analysis of this cDNA with mST8Sia V showed that each sequence of the predicted coding region contains 84% identity in both nucleotide and amino acid. Northern analysis of this cDNA indicated that, in contrast to mST8Sia V, two different sizes of transcripts corresponding to 11 and 2.5 kb were expressed in both human fetal and adult brain, while the transcript of 2.5 kb was detected only in adult heart and skeletal muscle. The enzyme expressed in COS cells showed a substrate specificity very similar to that of mST8Sia V. << Less
Biochem. Biophys. Res. Commun. 235:327-330(1997) [PubMed] [EuropePMC]
This publication is cited by 7 other entries.