Multi-model functionalization of disease-associated PTEN missense mutations identifies multiple molecular mechanisms underlying protein dysfunction
[Paper-level Aggregated] PMCID: PMC7190743
Evidence Type(s): Functional
Summary: Mutation: C124S | Summary: The C124S variant is characterized as catalytically inactive for both protein and lipid phosphatase functions, showing complete loss of function (LoF) indistinguishable from GFP controls in terms of PSD95 density. It alters molecular function by raising pAKT/AKT levels, consistent with a dominant negative phenotype, and is involved in genetic interactions that alter PI3P metabolism, indicating a significant alteration in molecular function.
Evidence Type: Functional Mutation: G129E | Summary: The G129E variant is described as a lipid phosphatase-dead variant and alters molecular function by raising pAKT/AKT levels, consistent with a dominant negative phenotype. It exhibited eclosion significantly faster than the empty vector control, suggesting a functional change in its activity.
Evidence Type: Functional Mutation: Y138L | Summary: Y138L is identified as a protein phosphatase-dead variant, indicating a change in the molecular function of the PTEN protein.
Evidence Type: Functional Mutation: N117S | Summary: The N117S variant slowed the developmental rate further than the wild-type, indicating a functional alteration in its role.
Evidence Type: Functional Mutation: Q298E | Summary: The Q298E variant also slowed the developmental rate further than the wild-type, suggesting a functional change in its activity.
Evidence Type: Functional Mutation: A79T | Summary: The A79T variant exhibited a gain-of-function (GoF) phenotype in axonal growth and altered PSD95 density and dendrite length, indicating a change in molecular function. It retained wild-type-like function in the context of chemotaxis assays in C. elegans.
Evidence Type: Functional Mutation: I101T | Summary: The I101T variant, along with C124S, increased soma size more than GFP, suggesting a change in molecular function related to neuronal growth.
Evidence Type: Functional Mutation: G132D | Summary: The G132D variant exhibited stronger negative chemotaxis than daf-18 mutants and increased soma size more than GFP, indicating a functional alteration associated with neuronal growth.
Evidence Type: Functional Mutation: D268E | Summary: The D268E variant showed partial loss of function (LoF) in the chemotaxis assays in daf-18 mutant worms and appeared wild-type-like in all measures of growth and synaptogenesis, suggesting it does not alter molecular function significantly.
Evidence Type: Functional Mutation: T167N | Summary: The T167N variant showed partial loss of function (LoF) in the chemotaxis assays in daf-18 mutant worms.
Evidence Type: Functional Mutation: Y176C | Summary: The Y176C variant showed partial loss of function (LoF) in the chemotaxis assays in daf-18 mutant worms.
Evidence Type: Functional Mutation: H93Y | Summary: The H93Y variant is associated with altered molecular function, specifically reduced protein stability compared to wild-type PTEN.
Evidence Type: Functional Mutation: P354Q | Summary: The P354Q variant retained wild-type-like function in the context of chemotaxis assays in C. elegans and does not show significant differences in protein stability compared to wild-type PTEN, indicating it may not alter molecular function.
Evidence Type: Functional Mutation: R130L | Summary: The R130L variant alters molecular function by exhibiting a change in stability between parental and PTEN-KO cells, suggesting its interaction with endogenous PTEN has minimal influence and does not show significant differences in protein stability compared to wild-type PTEN.
Evidence Type: Functional Mutation: R14G | Summary: The R14G variant does not show significant differences in protein stability compared to wild-type PTEN, indicating it may not alter molecular function.
Evidence Type: Functional Mutation: R15S | Summary: The R15S variant does not show significant differences in protein stability compared to wild-type PTEN, indicating it may not alter molecular function.
Evidence Type: Functional Mutation: T78A | Summary: The T78A variant does not show significant differences in protein stability compared to wild-type PTEN, indicating it may not alter molecular function.
Evidence Type: Functional Mutation: A126D | Summary: The A126D variant alters molecular function by exhibiting a change in stability between parental and PTEN-KO cells, suggesting its interaction with endogenous PTEN has minimal influence.
Evidence Type: Functional Mutation: A126P | Summary: The A126P variant alters molecular function by exhibiting a change in stability between parental and PTEN-KO cells, indicating its interaction with endogenous PTEN has minimal influence.
Evidence Type: Functional Mutation: H123Q | Summary: The H123Q variant alters molecular function by exhibiting a change in stability between parental and PTEN-KO cells, suggesting its interaction with endogenous PTEN has minimal influence.
Evidence Type: Functional Mutation: P38H | Summary: The P38H variant alters molecular function by exhibiting a change in stability between parental and PTEN-KO cells, indicating its interaction with endogenous PTEN has minimal influence.
Evidence Type: Functional Mutation: R130Q | Summary: The R130Q variant alters molecular function by exhibiting a change in stability between parental and PTEN-KO cells, indicating its interaction with endogenous PTEN has minimal influence.
Gene→Variant (gene-first): PTEN(5728):C124S PTEN(5728):G129E PTEN(5728):Y138L PTEN(5728):N117S PTEN(5728):Q298E PTEN(5728):A79T PTEN(5728):I101T PTEN(5728):G132D PTEN(5728):D268E PTEN(5728):T167N PTEN(5728):Y176C PTEN(5728):H93Y PTEN(5728):P354Q PTEN(5728):R130L PTEN(5728):R14G PTEN(5728):R15S PTEN(5728):T78A PTEN(5728):A126D PTEN(5728):A126P PTEN(5728):H123Q PTEN(5728):P38H PTEN(5728):R130Q
Genes: PTEN(5728)
Variants: C124S G129E Y138L N117S Q298E A79T I101T G132D D268E T167N Y176C H93Y P354Q R130L R14G R15S T78A A126D A126P H123Q P38H R130Q