UDP-galactose:globoside galactosyltransferase in murine kidney.
There are increased levels of stage-specific embryonic antigens-3 and -1 (SSEA-3 and SSEA-1) globo-series glycolipids in male versus female DBA/2 and C57BL/6 kidneys, respectively. To determine what enzymatic steps may be responsible for these differences, the activity and properties of UDP-galactos...
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| Format: | Article |
| Language: | English |
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Elsevier
1990-12-01
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| Series: | Journal of Lipid Research |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0022227520421108 |
| _version_ | 1818647422764580864 |
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| author | O Koul M Prada-Maluf RH McCluer |
| author_facet | O Koul M Prada-Maluf RH McCluer |
| author_sort | O Koul |
| collection | DOAJ |
| description | There are increased levels of stage-specific embryonic antigens-3 and -1 (SSEA-3 and SSEA-1) globo-series glycolipids in male versus female DBA/2 and C57BL/6 kidneys, respectively. To determine what enzymatic steps may be responsible for these differences, the activity and properties of UDP-galactose:globoside galactosyltransferase were studied in male and female mouse kidney microsomes. This enzyme participates in the biosynthesis of galactosylgloboside, SSEA-3 glycolipid; the reaction product was identified by high performance thin-layer chromatography (HPTLC) immunostaining. In C57BL/6 mice, the specific activity of the enzyme, in the presence of CHAPS, was 2-fold greater in the male than that in the female. Optimum pH for the enzyme from both sexes was about 5.6, and Mn2+ was essential for maximal activity. Fifty percent of the male and female enzyme activity was lost after preincubating the microsomes for 1 min at 55 degrees C; thereafter, the enzyme from female microsomes had a slower rate of denaturation. The Km for globoside in presence of sodium cholate for both male and female was 0.035 mM, but it was approximately 2-fold greater for the female in presence of CHAPS. The enzyme in male and female microsomes was differentially activated by CHAPS and cholate. The results suggest the presence of an enzyme modulator in these membranes. In DBA/2 mice, the enzyme activity was about 2-fold greater in males than that in the female. The specific activity of the enzyme in the two strains was of a similar magnitude.(ABSTRACT TRUNCATED AT 250 WORDS) |
| first_indexed | 2024-12-17T01:02:17Z |
| format | Article |
| id | doaj.art-530d751c59714863917a0e6161565f44 |
| institution | Directory Open Access Journal |
| issn | 0022-2275 |
| language | English |
| last_indexed | 2024-12-17T01:02:17Z |
| publishDate | 1990-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Lipid Research |
| spelling | doaj.art-530d751c59714863917a0e6161565f442022-12-21T22:09:24ZengElsevierJournal of Lipid Research0022-22751990-12-01311222272234UDP-galactose:globoside galactosyltransferase in murine kidney.O Koul0M Prada-Maluf1RH McCluer2Department of Biochemistry, E. K. Shriver Center, Waltham, MA 02254.Department of Biochemistry, E. K. Shriver Center, Waltham, MA 02254.Department of Biochemistry, E. K. Shriver Center, Waltham, MA 02254.There are increased levels of stage-specific embryonic antigens-3 and -1 (SSEA-3 and SSEA-1) globo-series glycolipids in male versus female DBA/2 and C57BL/6 kidneys, respectively. To determine what enzymatic steps may be responsible for these differences, the activity and properties of UDP-galactose:globoside galactosyltransferase were studied in male and female mouse kidney microsomes. This enzyme participates in the biosynthesis of galactosylgloboside, SSEA-3 glycolipid; the reaction product was identified by high performance thin-layer chromatography (HPTLC) immunostaining. In C57BL/6 mice, the specific activity of the enzyme, in the presence of CHAPS, was 2-fold greater in the male than that in the female. Optimum pH for the enzyme from both sexes was about 5.6, and Mn2+ was essential for maximal activity. Fifty percent of the male and female enzyme activity was lost after preincubating the microsomes for 1 min at 55 degrees C; thereafter, the enzyme from female microsomes had a slower rate of denaturation. The Km for globoside in presence of sodium cholate for both male and female was 0.035 mM, but it was approximately 2-fold greater for the female in presence of CHAPS. The enzyme in male and female microsomes was differentially activated by CHAPS and cholate. The results suggest the presence of an enzyme modulator in these membranes. In DBA/2 mice, the enzyme activity was about 2-fold greater in males than that in the female. The specific activity of the enzyme in the two strains was of a similar magnitude.(ABSTRACT TRUNCATED AT 250 WORDS)http://www.sciencedirect.com/science/article/pii/S0022227520421108 |
| spellingShingle | O Koul M Prada-Maluf RH McCluer UDP-galactose:globoside galactosyltransferase in murine kidney. Journal of Lipid Research |
| title | UDP-galactose:globoside galactosyltransferase in murine kidney. |
| title_full | UDP-galactose:globoside galactosyltransferase in murine kidney. |
| title_fullStr | UDP-galactose:globoside galactosyltransferase in murine kidney. |
| title_full_unstemmed | UDP-galactose:globoside galactosyltransferase in murine kidney. |
| title_short | UDP-galactose:globoside galactosyltransferase in murine kidney. |
| title_sort | udp galactose globoside galactosyltransferase in murine kidney |
| url | http://www.sciencedirect.com/science/article/pii/S0022227520421108 |
| work_keys_str_mv | AT okoul udpgalactoseglobosidegalactosyltransferaseinmurinekidney AT mpradamaluf udpgalactoseglobosidegalactosyltransferaseinmurinekidney AT rhmccluer udpgalactoseglobosidegalactosyltransferaseinmurinekidney |