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FEBS Lett. 1998 Oct 2;436(2):283-7.

Widespread occurrence of a highly conserved RING-H2 zinc finger motif in the model plant Arabidopsis thaliana.

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Institute of Molecular Biology, University of Copenhagen, Copenhagen K, Denmark.


Several novel Arabidopsis thaliana proteins containing a RING-H2 zinc finger motif were predicted after database searches. Alignment of 29 RING-H2 finger sequences shows that the motif is strikingly conserved in otherwise unrelated proteins. Only short, non-conserved polar/charged sequences distinguish these domains. The RING-H2 domain is most often present in multi-domain structures, a number of which are likely to contain a membrane-spanning region or an additional zinc finger. However, there are several small (126-200 residues) proteins consisting of an N-terminal domain, rich in aliphatic residues, and a C-terminal RING-H2 domain. Reverse-transcription PCR suggests that the RING-H2 genes are widely expressed at low levels.

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