Stanford Home
Ovarian Kaleidoscope Database (OKdb)

Home

History

Transgenic Mouse Models

INFORGRAPHICS

Search
Submit
Update
Chroms
Browse
Admin

Hsueh lab

HPMR

Visits
since 01/2001:
176557

DNA ligase 4 OKDB#: 5528
 Symbols: LIG4 Species: human
 Synonyms: LIG4S  Locus: 13q33.3 in Homo sapiens


For retrieval of Nucleotide and Amino Acid sequences please go to: OMIM Entrez Gene
Mammalian Reproductive Genetics   Endometrium Database Resource   Orthologous Genes   UCSC Genome Browser   GEO Profiles new!   Amazonia (transcriptome data) new!

R-L INTERACTIONS   MGI

DNA Microarrays
SHOW DATA ...
link to BioGPS
General Comment

NCBI Summary: The protein encoded by this gene is a DNA ligase that joins single-strand breaks in a double-stranded polydeoxynucleotide in an ATP-dependent reaction. This protein is essential for V(D)J recombination and DNA double-strand break (DSB) repair through nonhomologous end joining (NHEJ). This protein forms a complex with the X-ray repair cross complementing protein 4 (XRCC4), and further interacts with the DNA-dependent protein kinase (DNA-PK). Both XRCC4 and DNA-PK are known to be required for NHEJ. The crystal structure of the complex formed by this protein and XRCC4 has been resolved. Defects in this gene are the cause of LIG4 syndrome. Alternatively spliced transcript variants encoding the same protein have been observed. [provided by RefSeq, Jul 2008]
General function DNA repair, Enzyme
Comment
Cellular localization
Comment
Ovarian function
Comment
Expression regulated by
Comment
Ovarian localization
Comment
Follicle stages
Comment
Phenotypes POF (premature ovarian failure)
Mutations 1 mutations

Species: human
Mutation name:
type: naturally occurring
fertility: subfertile
Comment: Extreme growth failure is a common presentation of ligase IV deficiency. Murray JE et al. (2014) Ligase IV syndrome is a rare differential diagnosis for Nijmegen breakage syndrome owing to a shared predisposition to lympho-reticular malignancies, significant microcephaly, and radiation hypersensitivity. Only 16 cases with mutations in LIG4 have been described to date with phenotypes varying from malignancy in developmentally normal individuals, to severe combined immunodeficiency and early mortality. Here, we report the identification of biallelic truncating LIG4 mutations in 11 patients with microcephalic primordial dwarfism presenting with restricted prenatal growth and extreme postnatal global growth failure (average OFC -10.1 s.d., height -5.1 s.d.). Subsequently, most patients developed thrombocytopenia and leucopenia later in childhood and many were found to have previously unrecognized immunodeficiency following molecular diagnosis. None have yet developed malignancy, though all patients tested had cellular radiosensitivity. A genotype-phenotype correlation was also noted with position of truncating mutations corresponding to disease severity. This work extends the phenotypic spectrum associated with LIG4 mutations, establishing that extreme growth retardation with microcephaly is a common presentation of bilallelic truncating mutations. Such growth failure is therefore sufficient to consider a diagnosis of LIG4 deficiency and early recognition of such cases is important as bone marrow failure, immunodeficiency, and sometimes malignancy are long term sequelae of this disorder.//////////////////

Genomic Region show genomic region
Phenotypes and GWAS show phenotypes and GWAS
Reprogenomic viewer show phenotypes and GWAshow RNAseq data and genomic region in Reprogenomic viewer site
(After opening the Reprogenomics Viewer site, select your gene and click on Chromosome + Link)
Links
OMIM (Online Mendelian Inheritance in Man: an excellent source of general gene description and genetic information.)
OMIM \ Animal Model
KEGG Pathways
Recent Publications
None
Search for Antibody
Discuss..
blog comments powered by Disqus
Related Genes
Beta
Show data ...


created: Dec. 31, 2017, 1:37 p.m. by: system   email:
home page:
last update: Dec. 31, 2017, 1:38 p.m. by: hsueh    email:



Use the back button of your browser to return to the Gene List.

Click here to return to gene search form