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. 1977 Aug;74(8):3213–3216. doi: 10.1073/pnas.74.8.3213

Cleavage specificity of the restriction endonuclease isolated from Haemophilus gallinarum (Hga I).

N L Brown, M Smith
PMCID: PMC431501  PMID: 269384

Abstract

The nucleotide sequences in the replicative form (duplex) of phiX174 DNA around six sites cut by Hga I, a restriction endonuclease from Haemophilus gallinarum, have been compared. The enzyme produces a staggered cleavage resulting in a pentanucleotide 5'-terminal extension. The sequences within and immediately surrounding the pentanucleotide cleavage site have no obvious relationship. However, the sequence 5'-G-A-C-G-C-3' 3'-C-T-G-C-G-5' occurs five nucleotide pairs to the left of the cut in the upper strand and 10 nucleotide pairs to the left of the cut in the lower strand and, therefore, is believed to constitute the recognition site. This is a member of the class of restriction endonucleases in which recognition and cleavage sites lack 2-fold rotational symmetry. The method used to define the cleavage site is of general applicability.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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