ISSN:
1365-2958
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
,
Medicine
Notes:
A 6.7kb DNA fragment containing the pigment genes of Erwinia herbicola Eho13 has been cloned into Escherichia coli. These genes were chromosomally encoded in E. herbicola. The entire DNA fragment could be divided into at least three regions. Deletions in Region I resulted in a non-pigmented phenotype, a deletion in Region II resulted in a pink/yellow phenotype, deletions in Region III resulted in either a pink or a non-pigmented phenotype. Tn 1000 insertions in the same regions, however, gave different phenotypes. Insertions in Region U produced a pink phenotype. Insertions in Region III resulted in either a light-yellow or a non-pigmented phenotype. Minicell studies showed that the 6.7kb DNA fragment encoded at least five proteins (50kDa, 42kDa, 36kDa, 35kDa and 34kDa). A 2.7kb Hin dIII deletion in Region I caused the disappearance of these proteins, suggesting that this 2.7 kb fragment may play a regulatory role in pigment synthesis. Our results also showed that a 4.1kb Eco RV fragment consisted of Region I and a part of Region II complemented a pink/yellow clone of Eho10 (pHL545), suggesting that the pigments of Eho13 and Eho10 were probably similar or identical.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2958.1991.tb01842.x
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