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Systematic name YHR092C
Gene name HXT4
Aliases LGT1, RAG1
Feature type ORF, Verified
Coordinates Chr VIII:288811..287081
Primary SGDID S000001134

Description of YHR092C: High-affinity glucose transporter of the major facilitator superfamily, expression is induced by low levels of glucose and repressed by high levels of glucose[1][2]


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Alleles, Strains, and Phenotypes

Multiple Knockout Strains

Strain Background: CEN.PK2-1C
Genotype: EBY4000 (hxt)
Together with: HXT15, MPH2, HXT7, HXT6, HXT3, HXT13, HXT10, MAL11, HXT1, HXT5, HXT12, HXT8, HXT9, HXT16, MPH3, GAL2, HXT2, HXT14, HXT17, HXT11
Phenotype(s): Viable , Conditionally inviable when on glucose medium

The complete hxt null strain (EBY4000) is unable to take up hexoses and to grow on them. It is well suited to express and characterize heterologous glucose transporters. [3] [4]

DNA and RNA Details

Other DNA and RNA Details

Other Topic: expression

Specifically lower expression in carbon limited chemostat cultures versus carbon excess. [5] [6]

Protein Details

Protein Function/Process

The Hxt4p glucose transporter is one of four Hxt transporters (Hxt4p, Hxt5p, Hxt7p, Gal2p) able to take up xylose [7] [4]



See Help:References on how to add references

  1. Ozcan S and Johnston M (1995) Three different regulatory mechanisms enable yeast hexose transporter (HXT) genes to be induced by different levels of glucose. Mol Cell Biol 15(3):1564-72 SGD PMID 7862149
  2. Ozcan S and Johnston M (1999) Function and regulation of yeast hexose transporters. Microbiol Mol Biol Rev 63(3):554-69 SGD PMID 10477308
  3. Wieczorke R, et al. (1999) Concurrent knock-out of at least 20 transporter genes is required to block uptake of hexoses in Saccharomyces cerevisiae. FEBS Lett 464(3):123-8 SGD PMID 10618490
  4. 4.0 4.1 submitted by Eckhard Boles on 2003-03-17
  5. Boer VM, et al. (2003) The genome-wide transcriptional responses of Saccharomyces cerevisiae grown on glucose in aerobic chemostat cultures limited for carbon, nitrogen, phosphorus, or sulfur. J Biol Chem 278(5):3265-74 SGD PMID 12414795
  6. submitted by Viktor Boer on 2003-07-25
  7. Hamacher T, et al. (2002) Characterization of the xylose-transporting properties of yeast hexose transporters and their influence on xylose utilization. Microbiology 148(Pt 9):2783-8 SGD PMID 12213924

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