Evidence map›Paper›PMID 9399896›Full record

SynthesisAmerican journal of human genetics1997

Human phenylalanine hydroxylase mutations and hyperphenylalaninemia phenotypes: a metanalysis of genotype-phenotype correlations.

E Kayaalp, E Treacy, P J Waters, S Byck, P Nowacki, C R Scriver

Open access · bronzeAbstract readMeta-Analysis
In one paragraph

Synthesis in American journal of human genetics, 1997. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed, 1 pooled it
8.9field-weighted citation impact, top 2% of its field
1 · What the graph read from it

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

51 citing papers in PubMed, 1 synthesis or guideline pooled it, 202 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Trial
  4. Phenylketonuria in adulthood: a collaborative study.Journal of inherited metabolic disease · 2002
    Trial
  5. Mapping the Severity of Phenylalanine Hydroxylase Deficiency.Journal of inherited metabolic disease · 2026
    Review
  6. Review
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Genotype-phenotype correlations and BHMolecular genetics & genomic medicine · 2019
    Article
  14. Allelic phenotype values: a model for genotype-based phenotype prediction in phenylketonuria.Genetics in medicine : official journal of the American College of Medical Genetics · 2019
    Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

E KayaalpDeBelle Laboratory, McGill University-Montreal Children's Hospital Research Institute, Quebec, Canada.
E Treacy
P J Waters
S Byck
P Nowacki
C R Scriver
McGill University · CAMontreal Children's Hospital · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We analyzed correlations between mutant genotypes at the human phenylalanine hydroxylase locus (gene symbol PAH) and the corresponding hyperphenylalaninemia (HPA) phenotypes (notably, phenylketonuria [OMIM 261600]). We used reports, both published and in the PAH Mutation Analysis Consortium Database, on 365 patients harboring 73 different PAH mutations in 161 different genotypes. HPA phenotypes were classified as phenylketonuria (PKU), variant PKU, and non-PKU HPA. By analysis both of homoallelic mutant genotypes and of "functionally hemizygous" heteroallelic genotypes, we characterized the phenotypic effect of 48 of the 73 different, largely missense mutations. Among those with consistent in vivo expression, 24 caused PKU, 3 caused variant PKU, and 10 caused non-PKU HPA. However, 11 mutations were inconsistent in their effect: 9 appeared in two different phenotype classes, and 2 (I65T and Y414C) appeared in all three classes. Seven mutations were inconsistent in phenotypic effect when in vitro (unit-protein) expression was compared with the corresponding in vivo phenotype (an emergent property). We conclude that the majority of PAH mutations confer a consistent phenotype and that this is concordant with their effects, when known, predicted from in vitro expression analysis. However, significant inconsistencies, both between in vitro and in vivo phenotypes and between different individuals with similar PAH genotypes, reveal that the HPA-phenotype is more complex than that predicted by Mendelian inheritance of alleles at the PAH locus.

Indexed as

Point MutationAllelesAnimalsChromosomes, Human, Pair 12COS CellsEnzyme InductionFrameshift MutationGenetic HeterogeneityGenotypeHumansPhenotypePhenylalaninePhenylalanine HydroxylasePhenylketonuriasRecombinant Fusion ProteinsRNA SplicingPhenylalaninePhenylalanine HydroxylaseRecombinant Fusion Proteins

Identifiers

PMID9399896
PMCPMC1716084
OpenAlexW2042502655

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.