Reference: Tanaka J and Fink GR (1985) The histidine permease gene (HIP1) of Saccharomyces cerevisiae. Gene 38(1-3):205-14

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Abstract


The histidine-specific permease gene (HIP1) of Saccharomyces cerevisiae has been mapped, cloned, and sequenced. The HIP1 gene maps to the right arm of chromosome VII, approx. 11 cM distal to the ADE3 gene. The gene was isolated as an 8.6-kb BamHI-Sau3A fragment by complementation of the histidine-specific permease deficiency in recipient yeast cells. We sequenced a 2.4-kb subfragment of this BamHI-Sau3A fragment containing the HIP1 gene and identified a 1596-bp open reading frame (ORF). We confirmed the assignment of the 1596-bp ORF as the HIP1 coding sequence by sequencing a hip1 nonsense mutation. Analysis of the amino acid (aa) sequence of the HIP1 gene reveals several hydrophobic stretches, but shows no obvious N-terminal signal peptide. We have constructed a deletion of the HIP1 gene in vitro and replaced the wild-type copy of the gene with this deletion. The hip1 deletion mutant can grow when it is supplemented with 30 mM histidine, 50 times the amount required for the growth of HIP1 cells. Revertants of this deletion mutant able to grow on a normal level of histidine arise by mutation in unlinked genes. Both these observations suggest that there are additional, low-affinity pathways for histidine uptake.

Reference Type
Journal Article | Research Support, U.S. Gov't, P.H.S.
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Tanaka J, Fink GR
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