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CATH Superfamily 3.40.50.2000

Glycogen Phosphorylase B;

The name of this superfamily has been modified since the most recent official CATH+ release (v4_3_0). At the point of the last release, this superfamily was named:

"
Glycogen Phosphorylase B;
".

Functional Families

Overview of the Structural Clusters (SC) and Functional Families within this CATH Superfamily. Clusters with a representative structure are represented by a filled circle.
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FunFam 325: Digalactosyldiacylglycerol synthase 1, chloroplast...

There are 1 EC terms in this cluster

Please note: EC annotations are assigned to the full protein sequence rather than individual protein domains. Since a given protein can contain multiple domains, it is possible that some of the annotations below come from additional domains that occur in the same protein, but have been classified elsewhere in CATH.

Note: The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.

EC Term Annotations Evidence
Digalactosyldiacylglycerol synthase. [EC: 2.4.1.241]
UDP-alpha-D-galactose + 3-(beta-D-galactosyl)-1,2-diacyl-sn-glycerol = UDP + 3-(alpha-D-galactosyl-(1->6)-beta-D-galactosyl)-1,2-diacyl- sn-glycerol.
  • Diacylglycerol cannot serve as an acceptor molecule for galactosylation as in the reaction catalyzed by EC 2.4.1.46.
  • When phosphate is limiting, phospholipids in plant membranes are reduced but these are replaced, at least in part, by the glycolipids digalactosyldiacylglycerol (DGDG) and sulfoquinovosyldiacylglycerol.
  • While both DGD1 and DGD2 are increased under phosphate-limiting conditions, DGD2 does not contribute significantly under optimal growth conditions.
  • DGD2 is responsible for the synthesis of DGDG molecular species that are rich in C16 fatty acids at sn-1 of diacylglycerol whereas DGD1 leads to molecular species rich in C18 fatty acids.
  • The enzyme has been localized to the outer side of chloroplast envelope membranes.
 1 Q6DW76