| Id |
Subject |
Object |
Predicate |
Lexical cue |
| T1 |
0-252 |
Sentence |
denotes |
Molecular cloning and expression of human chondroitin N-acetylgalactosaminyltransferase: the key enzyme for chain initiation and elongation of chondroitin/dermatan sulfate on the protein linkage region tetrasaccharide shared by heparin/heparan sulfate. |
| T2 |
253-479 |
Sentence |
denotes |
Based on sequence homology with the recently cloned human chondroitin synthase, we identified a novel beta1,4-N-acetylgalactosaminyltransferase, which consisted of 532 amino acids with a type II transmembrane protein topology. |
| T3 |
480-565 |
Sentence |
denotes |
The amino acid sequence displayed 27% identity to that of human chondroitin synthase. |
| T4 |
566-1078 |
Sentence |
denotes |
The expression of a soluble form of the protein in COS-1 cells produced an active enzyme, which transferred beta1,4-N-acetylgalactosamine (GalNAc) from UDP-[(3)H]GalNAc not only to a polymer chondroitin representing growing chondroitin chains (beta-GalNAc transferase II activity) but also to GlcUAbeta1--3Galbeta1-O-C(2)H(4)NH-benzyloxycarbonyl, a synthetic substrate for beta-GalNAc transferase I that transfers the first GalNAc to the core tetrasaccharide in the protein linkage region of chondroitin sulfate. |
| T5 |
1079-1421 |
Sentence |
denotes |
Hence, the enzyme is involved in the biosynthetic initiation and elongation of chondroitin sulfate and is the key enzyme responsible for the selective chain assembly of chondroitin/dermatan sulfate on the linkage region tetrasaccharide common to various proteoglycans containing chondroitin/dermatan sulfate or heparin/heparan sulfate chains. |
| T6 |
1422-1523 |
Sentence |
denotes |
The coding region of this enzyme was divided into seven discrete exons and localized to chromosome 8. |
| T7 |
1524-1754 |
Sentence |
denotes |
Northern blot analysis revealed that the chondroitin GalNAc transferase gene exhibited a ubiquitous but markedly differential expression in human tissues and that the expression pattern was similar to that of chondroitin synthase. |
| T8 |
1755-1953 |
Sentence |
denotes |
Thus, more than two distinct enzymes forming the novel gene family are required for chain initiation and elongation in chondroitin/dermatan sulfate as in the biosynthesis of heparin/heparan sulfate. |