Id |
Subject |
Object |
Predicate |
Lexical cue |
T1 |
136-386 |
DRI_Background |
denotes |
Human UDP-d-xylose:proteoglycan core protein beta-d-xylosyltransferase (EC 2.4.2.26, XT-I) initiates the biosynthesis of glycosaminoglycan chains in proteoglycans by transferring xylose from UDP-xylose to specific serine residues of the core protein. |
T2 |
387-616 |
DRI_Approach |
denotes |
Based on the partial amino acid sequence of the purified enzyme from human JAR choriocarcinoma cell culture supernatant we isolated a cDNA encoding XT-I using the degenerate reverse transcriptase-polymerase chain reaction method. |
T3 |
617-824 |
DRI_Background |
denotes |
This enzyme, which is involved in chondroitin sulfate, heparan sulfate, heparin and dermatan sulfate biosynthesis, belongs to a novel family of glycosyltransferases with no homology to proteins known so far. |
T4 |
825-1006 |
DRI_Background |
denotes |
5' and 3'-RACE were performed to isolate a novel cDNA fragment of 3726 bp with a single open reading frame encoding at least 827 amino acid residues with a molecular mass of 91 kDa. |
T5 |
1007-1208 |
DRI_Background |
denotes |
The human XT-I gene was located on chromosome 16p13.1 using radiation hybrid mapping, and extracts from CHO-K1 cells transfected with the XT-I cDNA in an expression vector exhibited marked XT activity. |
T6 |
1209-1380 |
DRI_Background |
denotes |
A new 3608 bp cDNA fragment encoding a protein of 865 amino acid residues was also isolated by PCR using degenerate primers based on the amino acid sequence of human XT-I. |
T7 |
1381-1468 |
DRI_Background |
denotes |
The amino acid sequence of this XT-II isoform displayed 55% identity to the human XT-I. |
T8 |
1469-1588 |
DRI_Background |
denotes |
The XT-II gene was located on chromosome 17q21.3-17q22, and the exon/intron structure of the 15 kb gene was determined. |
T9 |
1589-1793 |
DRI_Outcome |
denotes |
RT-PCR analyses of XT-I and XT-II mRNA from various tissues confirmed that both XT-I and XT-II transcripts are ubiquitously expressed in the human tissues, although with different levels of transcription. |
T10 |
1794-1862 |
DRI_Background |
denotes |
Furthermore, the cDNAs encoding XT-I and XT-II from rat were cloned. |
T11 |
1863-1980 |
DRI_Background |
denotes |
The deduced amino acid sequences of rat xylosyltransferases displayed 94% identity to the corresponding human enzyme. |