The breakdown into simpler components of glycosaminoglycans, any one of a group of polysaccharides that contain amino sugars.

A sac-like vesicle that bears the photosynthetic pigments in photosynthetic organisms. In prokaryotes the thylakoids are of various shapes and are attached to the plasma membrane. In eukaryotes they are flattened, membrane-bound disk-like structures located in the chloroplasts; in the chloroplasts of higher plants the thylakoids form dense stacks called grana. Isolated thylakoid preparations can carry out photosynthetic electron transport and the associated phosphorylation.

Catalysis of the reaction: beta-D-glucose + NAD(P)+ = D-glucono-1,5-lactone + NAD(P)H.

Interacting selectively with AU-rich elements within the 3' untranslated region of mRNAs.

sterol regulatory element-binding protein site 2 protease activity

Catalysis of the cleavage, within the membrane-spanning helix, of the amino-terminal half (the intermediate form) of sterol regulatory element binding-protein (SREBP). This activity releases the transcription factor domain of SREBP from the membrane, freeing it to enter the nucleus.

The chemical reactions involving proteoglycans, any glycoprotein in which the carbohydrate units are glycosaminoglycans.

sterol regulatory element-binding protein protease activity

Catalysis of the hydrolysis of peptide bonds within a sterol regulatory element binding-protein (SREBP). SREBPs are transcription factors that bind sterol regulatory elements (SREs), DNA motifs found in the promoters of target genes.

Catalysis of the reaction: L-gulonate + NADP+ = D-glucuronate + NADPH.

Catalysis of the reaction: 3'-phosphoadenosine 5'-phosphosulfate + heparan sulfate = adenosine 3',5'-bisphosphate + heparan sulfate 6-O-sulfate; results in 6-O-sulfation of glucosamine residues in heparan sulfate.

Catalysis of the reaction: S-adenosyl-L-methionine + N-acetylserotonin = S-adenosyl-L-homocysteine + melatonin (N-acetyl-5-methoxytryptamine).

Interacting selectively with the sulfonylurea receptor, a regulatory subunit of the ATP-sensitive potassium ion channel.