======= GALNT4 =======
== Gene Information ==
* **Official Symbol**: GALNT4
* **Official Name**: polypeptide N-acetylgalactosaminyltransferase 4
* **Aliases and Previous Symbols**: N/A
* **Entrez ID**: [[https://www.ncbi.nlm.nih.gov/gene/?term=8693|8693]]
* **UniProt**: [[https://www.uniprot.org/uniprot/Q8N4A0|Q8N4A0]]
* **Interactions**: [[https://thebiogrid.org/search.php?search=GALNT4&organism=9606|BioGRID]]
* **PubMed articles**: [[https://www.ncbi.nlm.nih.gov/pubmed/?term=gene%20GALNT4|Open PubMed]]
* **OMIM**: [[https://omim.org/entry/603565|Open OMIM]]
== Function Summary ==
* **Entrez Summary**: This gene encodes a member of the UDP-N-acetyl-alpha-D-galactosamine:polypeptide N-acetylgalactosaminyltransferase (GalNAc-T) family of enzymes. GalNAc-Ts initiate mucin-type O-linked glycosylation in the Golgi apparatus by catalyzing the transfer of GalNAc to serine and threonine residues on target proteins. They are characterized by an N-terminal transmembrane domain, a stem region, a lumenal catalytic domain containing a GT1 motif and Gal/GalNAc transferase motif, and a C-terminal ricin/lectin-like domain. GalNAc-Ts have different, but overlapping, substrate specificities and patterns of expression. In vitro, the encoded protein can complement other GalNAc-Ts in the complete O-glycosylation of the mucin-1 tandem repeat and can O-glycosylate the P-selectin glycoprotein ligand-1 molecule. The coding region of this gene is contained within a single exon. Fusion transcripts, which combine part of this gene with the 5' exons of the neighboring POC1B (POC1 centriolar protein homolog B) gene, also exist. [provided by RefSeq, Dec 2010].
* **UniProt Summary**: Catalyzes the initial reaction in O-linked oligosaccharide biosynthesis, the transfer of an N-acetyl-D- galactosamine residue to a serine or threonine residue on the protein receptor. Has a highest activity toward Muc7, EA2 and Muc2, with a lowest activity than GALNT2. Glycosylates 'Thr-57' of SELPLG.
|Ricin B lectin|
|Glycos transf 2|
|protein O-linked glycosylation via threonine|
|protein O-linked glycosylation via serine|
|polypeptide N-acetylgalactosaminyltransferase activity|
|O-glycan processing|
|manganese ion binding|
|peptidyl-threonine modification|
|protein O-linked glycosylation|
|carbohydrate binding|
|peptidyl-serine modification|
|protein glycosylation|
|macromolecule glycosylation|
|glycosylation|
|glycoprotein biosynthetic process|
|glycoprotein metabolic process|
|Golgi membrane|
|carbohydrate derivative biosynthetic process|
|perinuclear region of cytoplasm|
|peptidyl-amino acid modification|
|Golgi apparatus|
|carbohydrate derivative metabolic process|
|organonitrogen compound biosynthetic process|
|cellular macromolecule biosynthetic process|
|macromolecule biosynthetic process|
\\
=== CRISPR Data ===
^Screen^Score^
|[[:results:exp470|Chloroquine 32μM R08 exp470]]|1.75|
|[[:results:exp451|Atovaquone 15μM R08 exp451]]|1.86|
|[[:results:exp190|Vincristine 0.0005μM R04 exp190]]|1.86|
|[[:results:exp458|Bisphenol S 100μM R08 exp458]]|1.94|
|[[:results:exp474|CR131-b 0.005μM R08 exp474]]|1.98|
No correlation found to any other genes in chemogenomics.
Global Fraction of Cell Lines Where Essential: 0/739
^Tissue^Fraction Of Cell Lines Where Essential^
|1290807.0|0/1|
|909776.0|0/1|
|bile duct|0/28|
|blood|0/28|
|bone|0/26|
|breast|0/33|
|central nervous system|0/56|
|cervix|0/4|
|colorectal|0/17|
|esophagus|0/13|
|fibroblast|0/1|
|gastric|0/16|
|kidney|0/21|
|liver|0/20|
|lung|0/75|
|lymphocyte|0/16|
|ovary|0/26|
|pancreas|0/24|
|peripheral nervous system|0/16|
|plasma cell|0/15|
|prostate|0/1|
|skin|0/24|
|soft tissue|0/9|
|thyroid|0/2|
|upper aerodigestive|0/22|
|urinary tract|0/29|
|uterus|0/5|
== Essentiality in NALM6 ==
* **Essentiality Rank**: 6496
* **Expression level (log2 read counts)**: 3.08
{{:chemogenomics:nalm6 dist.png?nolink |}}