The major form of MeCP2 has a novel N-terminus generated by alternative splicing.

Abstract:

:MeCP2 is a methyl-CpG binding protein that can repress transcription of nearby genes. In humans, mutations in the MECP2 gene are the major cause of Rett syndrome. By searching expressed sequence tag (EST) databases we have found a novel MeCP2 splice isoform (MeCP2alpha) which encodes a distinct N-terminus. We demonstrate that the MeCP2alpha mRNA splice variant is more abundant than the previously annotated MeCP2 mRNA (MeCP2beta) in mouse tissues and human brain. Furthermore, MeCP2beta mRNA has an upstream open reading frame that inhibits its translation. As a result of these differences, >90% of MeCP2 in mouse brain is MeCP2alpha. Both protein isoforms are nuclear and colocalize with densely methylated heterochromatic foci in mouse cells. The presence of a previously unknown MeCP2 isoform has implications for the genetic screening of Rett syndrome patients and for studies of the functional significance of MeCP2.

journal_name

Nucleic Acids Res

journal_title

Nucleic acids research

authors

Kriaucionis S,Bird A

doi

10.1093/nar/gkh349

keywords:

subject

Has Abstract

pub_date

2004-03-19 00:00:00

pages

1818-23

issue

5

eissn

0305-1048

issn

1362-4962

pii

32/5/1818

journal_volume

32

pub_type

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