PUBLICATION
Loss of function of Colgalt1 disrupts collagen post-translational modification and causes musculoskeletal defects
- Authors
- Geister, K.A., Lopez-Jimenez, A.J., Houghtaling, S., Ho, T.H., Vanacore, R., Beier, D.R.
- ID
- ZDB-PUB-190519-2
- Date
- 2019
- Source
- Disease models & mechanisms 12(6): (Journal)
- Registered Authors
- Beier, David R.
- Keywords
- Collagen glycosylation, Collagenopathies, ENU, Myopathy
- MeSH Terms
-
- Alleles
- Animals
- Collagen/metabolism*
- Embryo, Mammalian/pathology
- Extracellular Matrix/metabolism
- Fibroblasts/metabolism
- Fibroblasts/pathology
- Galactosyltransferases/deficiency*
- Galactosyltransferases/metabolism
- Glycosylation
- Loss of Function Mutation/genetics*
- Mice
- Molecular Weight
- Muscles/metabolism
- Muscles/pathology
- Musculoskeletal System/pathology*
- Mutation, Missense/genetics
- Phenotype
- Protein Processing, Post-Translational*
- Skin/metabolism
- Skin/pathology
- Zebrafish
- Zebrafish Proteins/metabolism*
- PubMed
- 31101663 Full text @ Dis. Model. Mech.
Citation
Geister, K.A., Lopez-Jimenez, A.J., Houghtaling, S., Ho, T.H., Vanacore, R., Beier, D.R. (2019) Loss of function of Colgalt1 disrupts collagen post-translational modification and causes musculoskeletal defects. Disease models & mechanisms. 12(6):.
Abstract
In a screen for organogenesis defects in ENU-induced mutant mice, we discovered a line carrying a mutation in Colgalt1 (collagen (beta 1-O) galactosyltransferase type 1), which is required for proper galactosylation of hydroxylysine residues in a number of collagens. Colgalt1 mutant embryos have not been previously characterized and exhibit skeletal and muscular defects. Analysis of mutant-derived embryonic fibroblasts reveals that COLGALT1 acts on collagen IV and VI, and, while collagen VI appears stable and its secretion is not affected, collagen IV accumulates inside of cells and within the extracellular matrix, possibly due to instability and increased degradation. We also generated mutant zebrafish that do not express the duplicated orthologs of mammalian Colgalt1 The double homozygote mutants have muscle defects; they are viable through the larvae stage but do not survive to 10 days post-fertilization. We hypothesize that the Colgalt1 mutant could serve as a model of a human connective tissue disorder and/or congenital muscular dystrophy or myopathy.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping