An official website of the United States government

MGAT4B - alpha-1,3-mannosyl-glycoprotein 4-beta-N-acetylglucosaminyltransferase B (human)

Gene
Symbol
Dates
  • Create:
    2016-09-14
  • Modify:
    2025-01-12
Description
This gene encodes a key glycosyltransferase that regulates the formation of tri- and multiantennary branching structures in the Golgi apparatus. The encoded protein, in addition to the related isoenzyme A, catalyzes the transfer of N-acetylglucosamine (GlcNAc) from UDP-GlcNAc in a beta-1,4 linkage to the Man-alpha-1,3-Man-beta-1,4-GlcNAc arm of R-Man-alpha-1,6(GlcNAc-beta-1,2-Man-alpha-1,3)Man-beta-1,4-GlcNAc-beta-1,4-GlcNAc-beta-1-Asn. The encoded protein may play a role in regulating the availability of serum glycoproteins, oncogenesis, and differentiation. [provided by RefSeq, Jul 2008]
Enables alpha-1,3-mannosylglycoprotein 4-beta-N-acetylglucosaminyltransferase activity. Involved in protein glycosylation. Predicted to be located in Golgi membrane. Predicted to be active in Golgi stack; endoplasmic reticulum; and endoplasmic reticulum-Golgi intermediate compartment.

1 Names and Identifiers

1.1 Synonyms

  • GNT-IV
  • GNT-IVB
  • N-acetylglucosaminyltransferase IVb
  • N-glycosyl-oligosaccharide-glycoprotein N-acetylglucosaminyltransferase IVb
  • UDP-N-acetylglucosamine: alpha-1,3-D-mannoside beta-1,4-N-acetylglucosaminyltransferase IV
  • UDP-N-acetylglucosamine: alpha-1,3-D-mannoside beta-1,4-N-acetylglucosaminyltransferase IVb
  • alpha-1,3-mannosyl-glycoprotein beta-1,4-N-acetylglucosaminyltransferase
  • aminyltransferase
  • glcNAc-T IVb
  • mannosyl (alpha-1,3-)-glycoprotein beta-1,4-N-acetylglucosaminyltransferase, isoenzyme B
  • mannosyl (alpha-1,3-)-glycoprotein beta-1,4-N-acetylglucosaminyltransferase, isozyme B

1.2 Other Identifiers

1.2.1 HGNC ID

1.2.2 Ensembl ID

1.2.3 Alliance Gene ID

1.2.4 Bgee Gene ID

1.2.5 Enzyme Commission (EC) Number

1.2.6 GlyCosmos Gene

1.2.7 MIM Number

1.2.8 Open Targets ID

1.2.9 PharmGKB ID

1.2.10 Pharos Target

1.2.11 VEuPathDB ID

1.2.12 Wikidata

3 Proteins

3.1 Protein Function

Glycosyltransferase that catalyzes the transfer of GlcNAc from UDP-GlcNAc to the GlcNAcbeta1-2Manalpha1-3 arm of the core structure of N-linked glycans through a beta1-4 linkage and participates in the production of tri- and tetra-antennary N-linked sugar chains (PMID: 10372966, PMID: 17006639). Prefers complex-type N-glycans over hybrid-types (PMID: 17006639). Has lower affinities for donors or acceptors than MGAT4A, suggesting that, under physiological conditions, it is not the main contributor in N-glycan biosynthesis (PMID: 17006639).

3.2 Protein Isoforms

Isoform
Isoform 1
UniProt ID
RefSeq Accession
Isoform
Isoform 2
UniProt ID
RefSeq Accession
Isoform
Isoform 3
UniProt ID
RefSeq Accession

3.3 Protein 3D Structures

3.3.1 AlphaFold Structures

Highly accurate protein structure prediction with AlphaFold. Nature. 2021 Aug;596(7873):583-589. DOI:10.1038/s41586-021-03819-2. PMID:34265844; PMCID:PMC8371605

3.4 Protein Targets

4 BioAssays

4.1 RNAi BioAssays

5 Diseases and Phenotypes

5.1 Gene-Disease Associations

6 Interactions and Pathways

6.1 Chemical-Gene Interactions

GlycoGene Database (GGDB): https://acgg.asia/db/ggdb

6.2 Interactions

6.3 Pathways

7 Biochemical Reactions

8 Expression

9 Target Development Level

10 Literature

10.1 Consolidated References

10.2 Gene-Chemical Co-Occurrences in Literature

10.3 Gene-Gene Co-Occurrences in Literature

10.4 Gene-Disease Co-Occurrences in Literature

11 Patents

11.1 Gene-Chemical Co-Occurrences in Patents

11.2 Gene-Gene Co-Occurrences in Patents

11.3 Gene-Disease Co-Occurrences in Patents

12 Classification

12.1 Gene Family

12.2 Gene Ontology: Biological Process

12.3 Gene Ontology: Cellular Component

12.4 Gene Ontology: Molecular Function

13 Information Sources

  1. NCBI Gene
    LICENSE
    NCBI Website and Data Usage Policies and Disclaimers
    https://www.ncbi.nlm.nih.gov/home/about/policies/
  2. PubChem
  3. Alliance of Genome Resources
    LICENSE
    All annotations and data produced by Alliance members that are accessible from alliancegenome.org are distributed under a CC BY 4.0 license (https://creativecommons.org/licenses/by/4.0/).
    https://www.alliancegenome.org/privacy-warranty-licensing
  4. BioGRID
    LICENSE
    The MIT License (MIT); Copyright Mike Tyers Lab
    https://wiki.thebiogrid.org/doku.php/terms_and_conditions
  5. STRING: functional protein association networks
  6. Comparative Toxicogenomics Database (CTD)
    LICENSE
    It is to be used only for research and educational purposes. Any reproduction or use for commercial purpose is prohibited without the prior express written permission of NC State University.
    http://ctdbase.org/about/legal.jsp
  7. GlyCosmos Glycoscience Portal
    LICENSE
    All copyrightable parts of the datasets in GlyCosmos are under the Creative Commons Attribution (CC BY 4.0) License.
    https://glycosmos.org/license
  8. HUGO Gene Nomenclature Committee (HGNC)
    LICENSE
    No restrictions are imposed on access to, or use of, the data provided by the HGNC, which are provided to enhance knowledge and encourage progress in the scientific community.
    https://www.genenames.org/about/
  9. NCBI Gene Expression Omnibus (GEO)
  10. Online Mendelian Inheritance in Man (OMIM)
    LICENSE
    The OMIM database is made available to the general public subject to certain restrictions.
    https://omim.org/help/copyright
  11. Open Targets
    LICENSE
    Datasets generated by the Open Targets Platform are freely available for download.
    https://platform-docs.opentargets.org/licence
  12. PharmGKB
    LICENSE
    PharmGKB data are subject to the Creative Commons Attribution-ShareALike 4.0 license (https://creativecommons.org/licenses/by-sa/4.0/).
    https://www.pharmgkb.org/page/policies
  13. Pharos
    LICENSE
    Data accessed from Pharos and TCRD is publicly available from the primary sources listed above. Please respect their individual licenses regarding proper use and redistribution.
    https://pharos.nih.gov/about
  14. Swiss Institute of Bioinformatics Bgee
    LICENSE
    Creative Commons Zero license (CC0)
    https://www.bgee.org/about/
  15. UniProt
    LICENSE
    We have chosen to apply the Creative Commons Attribution (CC BY 4.0, http://creativecommons.org/licenses/by/4.0/) License to all copyrightable parts of our databases.
    https://www.uniprot.org/help/license
  16. VEuPathDB: The Eukaryotic Pathogen, Vector and Host Informatics Resource
    LICENSE
    All data on VEuPathDB websites are provided freely for public use.
    https://veupathdb.org/veupathdb/app/static-content/about.html
  17. Wikidata
  18. Gene Ontology (GO)
    LICENSE
    Gene Ontology Consortium data and data products are licensed under the Creative Commons Attribution 4.0 Unported License (https://creativecommons.org/licenses/by/4.0/legalcode)
    http://geneontology.org/docs/go-citation-policy/
  19. AlphaFold DB
    LICENSE
    All of the data provided is freely available for both academic and commercial use under Creative Commons Attribution 4.0 (CC-BY 4.0) licence terms.
    https://alphafold.ebi.ac.uk/faq
  20. Rhea - annotated reactions database
    LICENSE
    Rhea has chosen to apply the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/). This means that you are free to copy, distribute, display and make commercial use of the database in all legislations, provided you credit (cite) Rhea.
    https://www.rhea-db.org/help/license-disclaimer
CONTENTS