Target intelligence / Profile preview

Carbohydrate sulfotransferase 1 (CHST1)

Target
CHST1
Molecular classification
Enzyme, Sulfotransferase, Membrane-associated enzyme (Golgi localized)
01

Overview

Carbohydrate sulfotransferase 1 (CHST1) is a Golgi-localized, membrane-bound enzyme that transfers a sulfate group from 3'-phosphoadenosine-5'-phosphosulfate (PAPS) to the 6-position of internal galactose residues on keratan sulfate chains, contributing to the biosynthesis and elongation of keratan sulfate proteoglycans in tissues such as cornea and brain. Its enzymatic activity influences extracellular matrix properties, cellular adhesion, and signaling, and it is implicated in connective tissue disorders and certain cancers, where altered expression serves as a potential disease marker.

Other names
C6STGST-1KS6STKSGal6STKSSTKeratan sulfate Gal-6 sulfotransferaseKeratan sulfotransferaseGalactose/N-acetylglucosamine/N-acetylglucosamine 6-O-sulfotransferase 1carbohydrate (chondroitin 6/keratan) sulfotransferase 1carbohydrate (keratan sulfate Gal-6) sulfotransferase 1
02

Mechanism of action

Not applicable; as above, no targeted drugs known. Theoretical: inhibitors would block 6-O-sulfation of galactose, altering glycan-mediated cell interactions.

03

Biological functions

Catalyzes sulfation of internal galactose residues of keratan sulfate and related glycoconjugatesBiosynthesis and elongation of keratan sulfate (a glycosaminoglycan in proteoglycans)Construction of O-linked glycans with 6-sulfoGalbeta motifsParticipates in formation of extracellular matrix proteoglycans important for cell communication, especially in brain development and lymph node high endothelial venulesContributes to immune cell trafficking through the biosynthesis of specific glycan motifs
04

Disease associations

Connective tissue disorders, especially macular corneal dystrophyCancer (overexpression linked to tumor progression, diagnostic and prognostic marker in malignancies)Inflammation (involved in leukocyte trafficking and tissue remodeling)
05

Safety considerations

Inhibition could disrupt normal keratan sulfate biosynthesis, potentially leading to corneal and cartilage pathologyChallenge: Substrate overlap among sulfotransferases may cause off-target effects if enzymes are pharmacologically inhibited
06

Interacting drugs

No specific drugs directly target CHST1 identified in current literature or standard pharmacological databases. Glycosaminoglycan pathway inhibitors may have indirect effect, but no direct clinical agent is currently known.
07

Biomarkers

Increased tissue/cellular expression used as diagnostic/prognostic biomarker in certain cancers and connective tissue disorders (not widely established as clinical biomarker)

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