ArticleThe Biochemical journal2004
Pyridoxine biosynthesis in yeast: participation of ribose 5-phosphate ketol-isomerase.
Article in The Biochemical journal, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
8 citing papers in PubMed, 30 citations in OpenAlex.
- Genetic and Physiological Characterization of the Pentose Phosphate Pathway in the YeastInternational journal of molecular sciences · 2025Article
- Review
- Harnessing the Endogenous 2μ Plasmid ofFrontiers in microbiology · 2021Article
- Review
- Metabolic differentiation of surface and invasive cells of yeast colony biofilms revealed by gene expression profiling.BMC genomics · 2017Article
- Genetic improvement of xylose metabolism by enhancing the expression of pentose phosphate pathway genes in Saccharomyces cerevisiae IR-2 for high-temperature ethanol production.Journal of industrial microbiology & biotechnology · 2017Article
- A framework for application of metabolic modeling in yeast to predict the effects of nsSNV in human orthologs.Biology direct · 2014Article
- Statistical analysis of pentose phosphate pathway genes from eubacteria and eukarya reveals translational selection as a major force in shaping codon usage pattern.Bioinformation · 2013Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
To identify the genes involved in pyridoxine synthesis in yeast, auxotrophic mutants were prepared. After transformation with a yeast genomic library, a transformant (A22t1) was obtained from one of the auxotrophs, A22, which lost the pyridoxine auxotrophy. From an analysis of the plasmid harboured in A22t1, the RKI1 gene coding for ribose 5-phosphate ketol-isomerase and residing on chromosome no. 15 was identified as the responsible gene. This notion was confirmed by gene disruption and tetrad analysis on a diploid prepared from the wild-type and the auxotroph. The site of mutation on the RKI1 gene was identified as position 566 with a transition from guanine to adenine, resulting in amino acid substitution of Arg-189 with lysine. The enzymic activity of the Arg189-->Lys (R189K) mutant of ribose 5-phosphate ketolisomerase was 0.6% when compared with the wild-type enzyme. Loss of the structural integrity of the protein seems to be responsible for the greatly diminished activity, which eventually leads to a shortage of either ribose 5-phosphate or ribulose 5-phosphate as the starting or intermediary material for pyridoxine synthesis.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.