SOL3/YHR163W Summary Help

SOL3 BASIC INFORMATION

Standard Name SOL3 1
Systematic Name YHR163W
Feature Type ORF, Verified
Description 6-phosphogluconolactonase, catalyzes the second step of the pentose phosphate pathway; weak multicopy suppressor of los1-1 mutation; homologous to Sol2p and Sol1p (2 and see Summary Paragraph)
Name Description Suppressor Of Los1-1 1
GO Annotations All SOL3 GO evidence and references
    View Computational GO annotations for SOL3
Molecular Function
Manually curated
Biological Process
Manually curated
Cellular Component
High-throughput
Pathways
Mutant Phenotype All SOL3 Phenotype details and references
Classical genetics
null
overexpression
Large-scale survey
null
Interactions SOL3 All interactions details and references
7 total interaction(s) for 7 unique genes/features.
Genetic Interactions
  • Phenotypic Enhancement: 6
  • Phenotypic Suppression: 1
Sequence Information
ChrVIII:423726 to 424475 | ORF Map | GBrowse
Gbrowse
Last Update Coordinates: 2005-11-07 | Sequence: 2005-11-07
Subfeature details
Relative
Coordinates		 Chromosomal
Coordinates		 Most Recent Updates
Coordinates Sequence
CDS 1..750 423726..424475 2005-11-07 2005-11-07
External Links All Associated Seq | E.C. | Entrez Gene | Entrez RefSeq Protein | MIPS | UniProtKB
Primary SGDIDS000001206

SOL3 RESOURCES

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SGD ORF map
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  • Localization Resources
  • Interactions
  • Phenotype Resources
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  • Comparison Resources
  • Functional Analysis

Click on histogram for expression summary
Expression Summary histogram

ADDITIONAL INFORMATION for SOL3

SUMMARY PARAGRAPH for SOL3

The Saccharomyces cerevisiae SOL protein family includes Sol1p, Sol2p, Sol3p, and Sol4p, and is unusual in that its individual members are biochemically distinct and spatially dispersed. Sol1p and Sol2p appear to function in tRNA nuclear export, as determined by mutant studies (2). Sol3p and Sol4p both exhibit 6-phosphogluconolactonase activity (EC 3.1.1.31) and function in the pentose phosphate pathway (2, 3). Although different analyses have produced slightly different results, Sol1p appears to localize mostly within the nucleus whereas Sol2p, Sol3p and Sol4p localize predominantly in the cytosol (2, 4). SOL1 is an efficient multi-copy suppressor of the loss of nonsense suppression defect displayed by los1 mutants, as is SOL2, although to a lesser extent. In contrast, Sol3p is only a very weak multi-copy suppressor of los1 mutations and Sol4p does not function in this capacity at all (2).

Null mutants in any or all of the four SOL genes are viable. Nulls in sol1 or sol2 display normal levels of 6-phosphogluconolactonase activity, but possess elevated levels of nuclear tRNA, indicating a defect in tRNA export from the nucleus (2). Null mutants in either sol3 or sol4 display reduced levels of 6-phosphogluconolactonase activity but possess normal levels of nuclear tRNA (2). The viability of quadruple null mutants in sol1-4 indicates that this gene family is not essential, but these mutants display no detectable 6-phosphogluconolactonase activity and do possess elevated levels of nuclear tRNA (2).

Sol1p, Sol2p, Sol3p and Sol4p have similarity to each other, and to Candida albicans Sol1p, Schizosaccharomyces pombe Sol1p, human PGLS which is associated with 6-phosphogluconolactonase deficiency, and human H6PD which is associated with cortisone reductase deficiency. Sol1p, Sol2p, Sol3p and Sol4p are also similar to the 6-phosphogluconolactonases in bacteria (Pseudomonas aeruginosa) and eukaryotes (Drosophila melanogaster, Arabidopsis thaliana, and Trypanosoma brucei), to the glucose-6-phosphate dehydrogenase enzymes from bacteria (Mycobacterium leprae) and eukaryotes (Plasmodium falciparum and rabbit liver microsomes), and have regions of similarity to proteins of the Nag family, including human GNPI and Escherichia coli NagB (2, 1, 5, 6).

Last updated: 2008-02-18

REFERENCES CITED ON THIS PAGE [View Complete Literature Guide for SOL3]

1) Shen WC, et al.  (1996) Los1p, involved in yeast pre-tRNA splicing, positively regulates members of the SOL gene family. Genetics 143(2):699-712
2) Stanford DR, et al.  (2004) Division of labor among the yeast Sol proteins implicated in tRNA nuclear export and carbohydrate metabolism. Genetics 168(1):117-27
3) Blank LM, et al.  (2005) Large-scale 13C-flux analysis reveals mechanistic principles of metabolic network robustness to null mutations in yeast. Genome Biol 6(6):R49
4) Huh WK, et al.  (2003) Global analysis of protein localization in budding yeast. Nature 425(6959):686-91
5) Collard F, et al.  (1999) Identification of the cDNA encoding human 6-phosphogluconolactonase, the enzyme catalyzing the second step of the pentose phosphate pathway(1). FEBS Lett 459(2):223-6
6) Duffieux F, et al.  (2000) Molecular characterization of the first two enzymes of the pentose-phosphate pathway of Trypanosoma brucei. Glucose-6-phosphate dehydrogenase and 6-phosphogluconolactonase. J Biol Chem 275(36):27559-65