Journal article
Analysis of Connexin Phosphorylation Sites
Methods (San Diego, Calif.), Vol.20(2), pp.196-204
02/2000
Handle:
https://hdl.handle.net/2376/107179
PMID: 10671313
Abstract
Most connexins, the proteins that form gap junction channels, are phosphoproteins. Connexin phosphorylation has been thought to regulate gap junctional protein trafficking, gap junction assembly, channel gating, and turnover. Connexin phosphorylation has been investigated in a variety of ways. Some connexins show mobility shifts in sodium dodecyl sulfate–polyacrylamide gel electrophoresis on phosphorylation. Kinase modulators can change the level of connexin phosphorylation and affect gap junctional communication levels. Metabolic labeling of cultured cells has allowed both phosphoamino acid identification and generation of phosphotryptic peptide maps. However, identification of the location of phosphorylated residues within the connexin sequence has required either targeted peptide synthesis, in vitro phosphorylation of known sites, and two-dimensional comigration studies or liquid chromatographic separation and N-terminal sequencing of peptides. In addition to these conventional methods, we discuss new applications of mass spectrometry to the identification of phosphorylated peptides and the specific residues phosphorylated within the connexin-derived peptide.
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Details
- Title
- Analysis of Connexin Phosphorylation Sites
- Creators
- Cynthia D CooperJoell L SolanMary Kay DolejsiPaul D Lampe
- Publication Details
- Methods (San Diego, Calif.), Vol.20(2), pp.196-204
- Academic Unit
- Molecular Biosciences, School of
- Publisher
- Elsevier Inc
- Identifiers
- 99900547349101842
- Language
- English
- Resource Type
- Journal article