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    1. Enhanced interpretation of 935 hotspot and non-hotspot RAS variants using evidence-based structural bioinformatics

      [Paper-level Aggregated] PMCID: PMC8688876

      Evidence Type(s): Functional, Oncogenic, Predictive, Prognostic

      Justification: Functional: The text discusses the biochemical properties of KRAS variants, including their effects on GTP binding, hydrolysis rates, and RAF affinity, indicating that these variants have functional consequences on the protein's activity. Oncogenic: The mention of KRAS variants, particularly hotspot mutations, in the context of their roles in cancer suggests that these mutations are associated with oncogenic potential, as they alter the protein's function in a way that can contribute to tumorigenesis. Predictive: The analysis includes predictions of RAF affinity and GAP-mediated hydrolysis rates for various KRAS variants, indicating that the data can be used to predict the functional impact of these mutations on KRAS activity. Prognostic: The study's findings on the varying effects of different KRAS mutations on downstream signaling and their correlation with pERK levels suggest that these variants may have prognostic implications in cancer outcomes.

      Gene→Variant (gene-first): KRAS(3845):A146T KRAS(3845):A146T/V HRAS(3265):A59T KRAS(3845):G12A/R KRAS(3845):G12A/R/S KRAS(3845):G12V/D KRAS(3845):G13C KRAS(3845):G13V/D BRAF(673):K177N KRAS(3845):L19F KRAS(3845):Q22K KRAS(3845):Q61 KRAS(3845):Q61H KRAS(3845):Q61L/P KRAS(3845):R164Q ZHX2(22882):T74P HRAS(3265):A146V BRAF(673):A18D KRAS(3845):G12D KRAS(3845):G12S KRAS(3845):G13D HRAS(3265):G13V KRAS(3845):K117N KRAS(3845):G12C KRAS(3845):G12C/D KRAS(3845):G12R KRAS(3845):G13C/D KRAS(3845):Q61H/L KRAS(3845):Q61P NRAS(4893):Q61R ZHX2(22882):V/A KRAS(3845):G12 KRAS(3845):G13 KRAS(3845):G12V ZHX2(22882):T74

      Genes: KRAS(3845) HRAS(3265) BRAF(673) ZHX2(22882) NRAS(4893)

      Variants: A146T A146T/V A59T G12A/R G12A/R/S G12V/D G13C G13V/D K177N L19F Q22K Q61 Q61H Q61L/P R164Q T74P A146V A18D G12D G12S G13D G13V K117N G12C G12C/D G12R G13C/D Q61H/L Q61P Q61R V/A G12 G13 G12V T74

    2. We investigated whether the above large-scale patterns characterize all KRAS, HRAS and NRAS hotspot variants, by projecting the amino acid substitutions at G12, G13 and Q61 and observed an overall similar pattern, but wi

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 20

      Evidence Type(s): Functional, Oncogenic

      Justification: Functional: The passage discusses how specific amino acid substitutions at G12, G13, and Q61 alter biochemical properties and mechanisms across RAS proteins, indicating a change in molecular function related to GTP hydrolysis and downstream signaling. Oncogenic: The mention of hotspot variants and their clustering patterns suggests that these somatic variants contribute to tumor development or progression, particularly in the context of their distinct biochemical properties and disease incidence.

      Gene→Variant (gene-first): 3845:G12 3845:G13 3845:Q61

      Genes: 3845

      Variants: G12 G13 Q61

    3. To visualize the relative changes in GAP-mediated hydrolysis and RAF affinity across all 935 RAS family variants, we extended PHATE to 2D and followed a similar procedure as above. 2D PHATE for GAP-mediated hydrolysis (F

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 19

      Evidence Type(s): Functional, Oncogenic

      Justification: Functional: The passage discusses how different KRAS mutations, including G12C/D and G12D, affect downstream activity and enzyme function, as demonstrated by Western blot analyses measuring pERK levels. Oncogenic: The mention of KRAS hotspot variants and their distinct effects on downstream signaling suggests that these somatic mutations contribute to tumor development or progression.

      Gene→Variant (gene-first): 3845:G12 3845:G12C 3845:G12C/D 3845:G12D 3845:G13 3845:Q61

      Genes: 3845

      Variants: G12 G12C G12C/D G12D G13 Q61

    4. Additionally, we predicted relative RAF affinity changes for amino acid substitutions lacking experimental measurements (15 out of 23; Fig. 4B). These include G12S, which we predict has a decreased RAF affinity like othe

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 16

      Evidence Type(s): Functional, Predictive

      Justification: Functional: The passage discusses how specific amino acid substitutions affect RAF affinity, indicating that these variants alter molecular function related to protein interactions. Predictive: The passage predicts changes in RAF affinity for various variants, suggesting a correlation with potential therapeutic responses or resistance based on their affinity levels.

      Gene→Variant (gene-first): 3265:A146V 673:A18D 3265:A59T 3845:G12 3845:G12S 3845:G13C 3265:G13V 3845:K117N 3845:L19F 3845:Q22K 3845:Q61H 3845:Q61P 4893:Q61R 3845:R164Q 22882:T74P

      Genes: 3265 673 3845 4893 22882

      Variants: A146V A18D A59T G12 G12S G13C G13V K117N L19F Q22K Q61H Q61P Q61R R164Q T74P

    5. We investigated how the 23 KRAS variants change RAF affinity by first identifying the computational scores exhibiting strongest associations with this property (Fig. 4), all of which were from 3D structure and emphasize

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 15

      Evidence Type(s): Functional, Oncogenic

      Justification: Functional: The passage discusses how the KRAS variants alter RAF affinity, indicating that these variants affect molecular function, specifically in relation to protein interactions and binding properties. Oncogenic: The context of the variants being associated with RAF affinity suggests a role in tumor development or progression, as RAF is a key component in signaling pathways that drive cancer.

      Gene→Variant (gene-first): 3845:A146T 3265:A146V 673:A18D 3265:A59T 3845:G12C 3845:G12C/D 3845:G12R 3845:G13C/D 3265:G13V 3845:K117N 3845:L19F 3845:Q22K 3845:Q61H/L 3845:Q61P 4893:Q61R 3845:R164Q 22882:T74P 22882:V/A

      Genes: 3845 3265 673 4893 22882

      Variants: A146T A146V A18D A59T G12C G12C/D G12R G13C/D G13V K117N L19F Q22K Q61H/L Q61P Q61R R164Q T74P V/A

    6. In our second approach, we used PHATE dimensionality reduction to score overall similarities among the 935 variants from 7 RAS genes. We performed 1D PHATE (PHATE1) analysis of the 5 computational scores that correlated

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 13

      Evidence Type(s): Functional, Predictive, Oncogenic

      Justification: Functional: The passage discusses how mutated KRAS proteins may alter GAP binding and change GAP-mediated hydrolysis rates, indicating that the variants affect molecular function. Predictive: The analysis provides a probability density distribution and suggests that the variants can predict relative levels for mutations based on their GAP-mediated hydrolysis rates, indicating a correlation with functional outcomes. Oncogenic: The context of the variants being associated with cancer and their effects on GAP-mediated hydrolysis suggests that these somatic variants contribute to tumor development or progression.

      Gene→Variant (gene-first): 3845:A146T 3265:A146V 673:A18D 3265:A59T 3845:G12A/R 3845:G12D 3845:G12S 3845:G13C 3845:G13D 3265:G13V 3845:K117N 3845:L19F 3845:Q22K 3845:Q61H 22882:T74P

      Genes: 3845 3265 673 22882

      Variants: A146T A146V A18D A59T G12A/R G12D G12S G13C G13D G13V K117N L19F Q22K Q61H T74P

    7. In our first approach, we examined patterns among five computational scores (one protein sequence and four 3D structure-based scores) that correlate with the GAP-mediated hydrolysis rate (Fig. 3A and B). All four structu

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 12

      Evidence Type(s): Functional

      Justification: Functional: The passage discusses how mutations, including G13C, A146V, K117N, and G13V, alter local stability and modulate local unfolding, indicating a change in molecular function related to the hydrolysis rate.

      Gene→Variant (gene-first): 3265:A146V 3845:G13C 3265:G13V 3845:K117N

      Genes: 3265 3845

      Variants: A146V G13C G13V K117N

    8. Because genetic variation outside of classic somatic hotspots has received relatively little attention, we next sought to quantify similarities among them by combining information across different experimental measuremen

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 5

      Evidence Type(s): Functional, Diagnostic

      Justification: Functional: The passage discusses how various KRAS variants, including both hotspot and non-hotspot mutations, exhibit distinct profiles and behaviors based on experimental measurements, indicating that these variants alter molecular or biochemical function. Diagnostic: The mention of clustering variants and their association with specific profiles suggests that these variants can be used to classify or define differences in behavior, which aligns with diagnostic evidence.

      Gene→Variant (gene-first): 3845:A146T 3845:A146T/V 3265:A59T 3845:G12A/R 3845:G12A/R/S 3845:G12V/D 3845:G13C 3845:G13V/D 673:K177N 3845:L19F 3845:Q22K 3845:Q61 3845:Q61H 3845:Q61L/P 3845:R164Q 22882:T74P

      Genes: 3845 3265 673 22882

      Variants: A146T A146T/V A59T G12A/R G12A/R/S G12V/D G13C G13V/D K177N L19F Q22K Q61 Q61H Q61L/P R164Q T74P

    9. We developed a harmonized dataset for rapidly assessing mutational effects on the biochemical properties of the GTPase encoded by KRAS. We collected, processed, and categorized data derived from studying 23 KRAS hotspot

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 4

      Evidence Type(s): Functional

      Justification: Functional: The passage discusses how various KRAS variants, including G12, G12V, G13, Q61, and T74, affect biochemical properties such as GTP binding, nucleotide exchange, and hydrolysis, indicating that these variants alter molecular or biochemical function.

      Gene→Variant (gene-first): 3845:G12 3845:G12V 3845:G13 3845:Q61 22882:T74

      Genes: 3845 22882

      Variants: G12 G12V G13 Q61 T74

    10. We investigated whether the above large-scale patterns characterize all KRAS, HRAS and NRAS hotspot variants, by projecting the amino acid substitutions at G12, G13 and Q61 and observed an overall similar pattern, but wi

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 20

      Evidence Type(s): Functional, Oncogenic

      Justification: Functional: The passage discusses how specific amino acid substitutions at G12, G13, and Q61 alter biochemical properties and mechanisms across RAS proteins, indicating a change in molecular function related to GTP hydrolysis and downstream signaling. Oncogenic: The mention of hotspot variants and their clustering patterns suggests that these somatic variants contribute to tumor development or progression, particularly in the context of their distinct biochemical properties and disease incidence.

      Gene→Variant (gene-first): 3845:G12 3845:G13 3845:Q61

      Genes: 3845

      Variants: G12 G13 Q61

    11. To visualize the relative changes in GAP-mediated hydrolysis and RAF affinity across all 935 RAS family variants, we extended PHATE to 2D and followed a similar procedure as above. 2D PHATE for GAP-mediated hydrolysis (F

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 19

      Evidence Type(s): Functional, Oncogenic

      Justification: Functional: The passage discusses how different KRAS mutations, including G12C/D and G12D, affect downstream activity and enzyme function, as demonstrated by Western blot analyses measuring pERK levels. Oncogenic: The mention of KRAS hotspot variants and their distinct effects on downstream signaling suggests that these somatic mutations contribute to tumor development or progression.

      Gene→Variant (gene-first): 3845:G12 3845:G12C 3845:G12C/D 3845:G12D 3845:G13 3845:Q61

      Genes: 3845

      Variants: G12 G12C G12C/D G12D G13 Q61

    12. Additionally, we predicted relative RAF affinity changes for amino acid substitutions lacking experimental measurements (15 out of 23; Fig. 4B). These include G12S, which we predict has a decreased RAF affinity like othe

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 16

      Evidence Type(s): Functional, Predictive

      Justification: Functional: The passage discusses how specific amino acid substitutions affect RAF affinity, indicating that these variants alter molecular function related to protein interactions. Predictive: The passage predicts changes in RAF affinity for various variants, suggesting a correlation with potential therapeutic responses or resistance based on their affinity levels.

      Gene→Variant (gene-first): 3265:A146V 673:A18D 3265:A59T 3845:G12 3845:G12S 3845:G13C 3265:G13V 3845:K117N 3845:L19F 3845:Q22K 3845:Q61H 3845:Q61P 4893:Q61R 3845:R164Q 22882:T74P

      Genes: 3265 673 3845 4893 22882

      Variants: A146V A18D A59T G12 G12S G13C G13V K117N L19F Q22K Q61H Q61P Q61R R164Q T74P

    13. We investigated how the 23 KRAS variants change RAF affinity by first identifying the computational scores exhibiting strongest associations with this property (Fig. 4), all of which were from 3D structure and emphasize

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 15

      Evidence Type(s): Functional, Oncogenic

      Justification: Functional: The passage discusses how the KRAS variants alter RAF affinity, indicating that these variants affect molecular function, specifically in relation to protein interactions and binding properties. Oncogenic: The context of the variants being associated with RAF affinity suggests a role in tumor development or progression, as RAF is a key component in signaling pathways that drive cancer.

      Gene→Variant (gene-first): 3845:A146T 3265:A146V 673:A18D 3265:A59T 3845:G12C 3845:G12C/D 3845:G12R 3845:G13C/D 3265:G13V 3845:K117N 3845:L19F 3845:Q22K 3845:Q61H/L 3845:Q61P 4893:Q61R 3845:R164Q 22882:T74P 22882:V/A

      Genes: 3845 3265 673 4893 22882

      Variants: A146T A146V A18D A59T G12C G12C/D G12R G13C/D G13V K117N L19F Q22K Q61H/L Q61P Q61R R164Q T74P V/A

    14. In our second approach, we used PHATE dimensionality reduction to score overall similarities among the 935 variants from 7 RAS genes. We performed 1D PHATE (PHATE1) analysis of the 5 computational scores that correlated

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 13

      Evidence Type(s): Functional, Predictive, Oncogenic

      Justification: Functional: The passage discusses how mutated KRAS proteins may alter GAP binding and change GAP-mediated hydrolysis rates, indicating that the variants affect molecular function. Predictive: The analysis provides a probability density distribution and suggests that the variants can predict relative levels for mutations based on their GAP-mediated hydrolysis rates, indicating a correlation with functional outcomes. Oncogenic: The context of the variants being associated with cancer and their effects on GAP-mediated hydrolysis suggests that these somatic variants contribute to tumor development or progression.

      Gene→Variant (gene-first): 3845:A146T 3265:A146V 673:A18D 3265:A59T 3845:G12A/R 3845:G12D 3845:G12S 3845:G13C 3845:G13D 3265:G13V 3845:K117N 3845:L19F 3845:Q22K 3845:Q61H 22882:T74P

      Genes: 3845 3265 673 22882

      Variants: A146T A146V A18D A59T G12A/R G12D G12S G13C G13D G13V K117N L19F Q22K Q61H T74P

    15. In our first approach, we examined patterns among five computational scores (one protein sequence and four 3D structure-based scores) that correlate with the GAP-mediated hydrolysis rate (Fig. 3A and B). All four structu

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 12

      Evidence Type(s): Functional

      Justification: Functional: The passage discusses how mutations, including G13C, A146V, K117N, and G13V, alter local stability and modulate local unfolding, indicating a change in molecular function related to the hydrolysis rate.

      Gene→Variant (gene-first): 3265:A146V 3845:G13C 3265:G13V 3845:K117N

      Genes: 3265 3845

      Variants: A146V G13C G13V K117N

    16. Because genetic variation outside of classic somatic hotspots has received relatively little attention, we next sought to quantify similarities among them by combining information across different experimental measuremen

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 5

      Evidence Type(s): Functional, Diagnostic

      Justification: Functional: The passage discusses how various KRAS variants, including both hotspot and non-hotspot mutations, exhibit distinct profiles and behaviors based on experimental measurements, indicating that these variants alter molecular or biochemical function. Diagnostic: The mention of clustering variants and their association with specific profiles suggests that these variants can be used to classify or define differences in behavior, which aligns with diagnostic evidence.

      Gene→Variant (gene-first): 3845:A146T 3845:A146T/V 3265:A59T 3845:G12A/R 3845:G12A/R/S 3845:G12V/D 3845:G13C 3845:G13V/D 673:K177N 3845:L19F 3845:Q22K 3845:Q61 3845:Q61H 3845:Q61L/P 3845:R164Q 22882:T74P

      Genes: 3845 3265 673 22882

      Variants: A146T A146T/V A59T G12A/R G12A/R/S G12V/D G13C G13V/D K177N L19F Q22K Q61 Q61H Q61L/P R164Q T74P

    17. We developed a harmonized dataset for rapidly assessing mutational effects on the biochemical properties of the GTPase encoded by KRAS. We collected, processed, and categorized data derived from studying 23 KRAS hotspot

      [Paragraph-level] PMCID: PMC8688876 Section: RESULTS PassageIndex: 4

      Evidence Type(s): Functional

      Justification: Functional: The passage discusses how various KRAS variants, including G12, G12V, G13, Q61, and T74, affect biochemical properties such as GTP binding, nucleotide exchange, and hydrolysis, indicating that these variants alter molecular or biochemical function.

      Gene→Variant (gene-first): 3845:G12 3845:G12V 3845:G13 3845:Q61 22882:T74

      Genes: 3845 22882

      Variants: G12 G12V G13 Q61 T74