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Primary topic: PEMT gene choline metabolism

PEMT Gene and Metabolism: What It Means for Your Body

PEMT is relevant for choline handling and phosphatidylcholine synthesis, which matter for liver function, membrane integrity, and methylation-related support.

What is the PEMT gene?

PEMT helps produce phosphatidylcholine from methyl donors. This connects choline metabolism, liver support, membrane structure, and methylation demand in a very practical way.

How PEMT affects metabolism

If PEMT-related production is less efficient, reliance on dietary choline can become more important. That may create pressure in liver-related lipid handling and in the balance between choline needs and methyl-donor use.

What happens when PEMT is altered

Altered PEMT signaling does not automatically mean deficiency, but it can shift how vulnerable the pathway is when dietary intake is inconsistent or when methylation demand is already high.

Curated SNP evidence for PEMT

These SNPs come from the approved study-level evidence model. Each claim is scored from curated study rows, then gated before it can influence pathway scoring.

Choline support Methylation

Evidence-backed report connection

PEMT currently has 2 curated SNPs, 6 claim-level scores, and 4 claims eligible for pathway scoring.

Open the sample report
rs12325817PEMT promoter signal3 claims · 9 study rows

expression · CC

PEMT gene expression

Strong

rs12325817 CC is associated with reduced PEMT gene expression.

PEMT rs12325817 is scored as a lower hormone-responsive PEMT expression tendency for C-containing genotypes, strongest for CC.

Likely effectLower gene expression signal
Signal sizeSmall signal
Evidence supportModerate support
Report useIncluded in pathway scoring
Show study evidence
NCBI RefSNP recordidentity only · unknownNCBI RefSNP data identify rs12325817 as a PEMT variant with transcript annotations in or near PEMT regulatory regions. This supports curation against PEMT expression rather than a protein-coding enzyme-change score.PubMed 16816108biomarker association · loose proxyDa Costa et al. fed 57 people a low-choline diet and reported that 18 of 23 carriers of the PEMT -744C allele, rs12325817, developed organ dysfunction under that controlled low-choline challenge. This supports a C-allele tendency that matters most when dietary choline is limited.PubMed 21059658functional assay · directResseguie et al. reported that rs12325817 was strongly linked with choline deficiency syndrome in women and was near a critical estrogen response element. The risk allele failed to bind estrogen receptor or FOXA1 in their experiments, supporting lower hormone-inducible PEMT expression as the curated effect.

expression · CG

PEMT gene expression

Moderate

rs12325817 CG is associated with reduced PEMT gene expression.

PEMT rs12325817 is scored as a lower hormone-responsive PEMT expression tendency for C-containing genotypes, strongest for CC.

Likely effectLower gene expression signal
Signal sizeSmall signal
Evidence supportModerate support
Report useIncluded in pathway scoring
Show study evidence
NCBI RefSNP recordidentity only · unknownNCBI RefSNP data identify rs12325817 as a PEMT variant with transcript annotations in or near PEMT regulatory regions. This supports curation against PEMT expression rather than a protein-coding enzyme-change score.PubMed 16816108biomarker association · loose proxyDa Costa et al. fed 57 people a low-choline diet and reported that 18 of 23 carriers of the PEMT -744C allele, rs12325817, developed organ dysfunction under that controlled low-choline challenge. This supports a C-allele tendency that matters most when dietary choline is limited.PubMed 21059658functional assay · directResseguie et al. reported that rs12325817 was strongly linked with choline deficiency syndrome in women and was near a critical estrogen response element. The risk allele failed to bind estrogen receptor or FOXA1 in their experiments, supporting lower hormone-inducible PEMT expression as the curated effect.

expression · GG

PEMT gene expression

Not used for pathway scoring

rs12325817 GG has no scored directional claim for PEMT gene expression.

PEMT rs12325817 is scored as a lower hormone-responsive PEMT expression tendency for C-containing genotypes, strongest for CC.

Likely effectNo clear expression signal
Signal sizeMinimal signal
Evidence supportVery limited support
Report useEvidence only, not scored
Show study evidence
NCBI RefSNP recordidentity only · unknownNCBI RefSNP data identify rs12325817 as a PEMT variant with transcript annotations in or near PEMT regulatory regions. This supports curation against PEMT expression rather than a protein-coding enzyme-change score.PubMed 16816108biomarker association · loose proxyDa Costa et al. fed 57 people a low-choline diet and reported that 18 of 23 carriers of the PEMT -744C allele, rs12325817, developed organ dysfunction under that controlled low-choline challenge. This supports a C-allele tendency that matters most when dietary choline is limited.PubMed 21059658functional assay · directResseguie et al. reported that rs12325817 was strongly linked with choline deficiency syndrome in women and was near a critical estrogen response element. The risk allele failed to bind estrogen receptor or FOXA1 in their experiments, supporting lower hormone-inducible PEMT expression as the curated effect.
rs7946V175M3 claims · 12 study rows

enzyme activity · TT

PEMT enzyme activity

Strong

rs7946 TT is associated with reduced PEMT enzyme activity.

PEMT rs7946 is scored as a lower PEMT enzyme-activity tendency for T-containing genotypes, with a stronger score for TT than CT.

Likely effectLower enzyme activity signal
Signal sizeModerate signal
Evidence supportStrong support
Report useIncluded in pathway scoring
Show study evidence
NCBI RefSNP recordidentity only · unknownNCBI RefSNP data identify rs7946 as a C/T variant in PEMT. Transcript annotations include NM_007169.3:c.523G>A with a predicted p.Val175Met protein change for the T-containing genomic allele, supporting use of C, CT, and TT genotype letters in this file.PMC1256033functional assay · directSong et al. reported that the PEMT V175M variant showed diminished activity in transfected cells and was more common in people with nonalcoholic fatty liver disease than controls in their study. This supports scoring T-containing genotypes as a lower PEMT enzyme-activity tendency, with a larger score for TT than CT.PubMed 26636496review · directTan et al. performed a meta-analysis of PEMT rs7946 and nonalcoholic fatty liver disease and reported that the transcript A allele was associated with higher NAFLD susceptibility, especially in East Asian subgroup analyses. This supports biological relevance but is still disease-association evidence, so the JSON limits interpretation to enzyme-activity tendency rather than disease prediction.PubMed 16816108functional assay · directA controlled feeding study on choline requirement noted rs7946 as a functionally significant PEMT SNP, but also reported that the low-choline response was not explained by this SNP alone. This supports a conservative certainty score and highlights that diet, sex, hormones, and other variants can affect practical interpretation.

enzyme activity · CT

PEMT enzyme activity

Moderate

rs7946 CT is associated with reduced PEMT enzyme activity.

PEMT rs7946 is scored as a lower PEMT enzyme-activity tendency for T-containing genotypes, with a stronger score for TT than CT.

Likely effectLower enzyme activity signal
Signal sizeSmall signal
Evidence supportStrong support
Report useIncluded in pathway scoring
Show study evidence
NCBI RefSNP recordidentity only · unknownNCBI RefSNP data identify rs7946 as a C/T variant in PEMT. Transcript annotations include NM_007169.3:c.523G>A with a predicted p.Val175Met protein change for the T-containing genomic allele, supporting use of C, CT, and TT genotype letters in this file.PMC1256033functional assay · directSong et al. reported that the PEMT V175M variant showed diminished activity in transfected cells and was more common in people with nonalcoholic fatty liver disease than controls in their study. This supports scoring T-containing genotypes as a lower PEMT enzyme-activity tendency, with a larger score for TT than CT.PubMed 26636496review · directTan et al. performed a meta-analysis of PEMT rs7946 and nonalcoholic fatty liver disease and reported that the transcript A allele was associated with higher NAFLD susceptibility, especially in East Asian subgroup analyses. This supports biological relevance but is still disease-association evidence, so the JSON limits interpretation to enzyme-activity tendency rather than disease prediction.PubMed 16816108functional assay · directA controlled feeding study on choline requirement noted rs7946 as a functionally significant PEMT SNP, but also reported that the low-choline response was not explained by this SNP alone. This supports a conservative certainty score and highlights that diet, sex, hormones, and other variants can affect practical interpretation.

enzyme activity · CC

PEMT enzyme activity

Not used for pathway scoring

rs7946 CC has no scored directional claim for PEMT enzyme activity.

PEMT rs7946 is scored as a lower PEMT enzyme-activity tendency for T-containing genotypes, with a stronger score for TT than CT.

Likely effectNo clear enzyme signal
Signal sizeMinimal signal
Evidence supportVery limited support
Report useEvidence only, not scored
Show study evidence
NCBI RefSNP recordidentity only · unknownNCBI RefSNP data identify rs7946 as a C/T variant in PEMT. Transcript annotations include NM_007169.3:c.523G>A with a predicted p.Val175Met protein change for the T-containing genomic allele, supporting use of C, CT, and TT genotype letters in this file.PMC1256033functional assay · directSong et al. reported that the PEMT V175M variant showed diminished activity in transfected cells and was more common in people with nonalcoholic fatty liver disease than controls in their study. This supports scoring T-containing genotypes as a lower PEMT enzyme-activity tendency, with a larger score for TT than CT.PubMed 26636496review · directTan et al. performed a meta-analysis of PEMT rs7946 and nonalcoholic fatty liver disease and reported that the transcript A allele was associated with higher NAFLD susceptibility, especially in East Asian subgroup analyses. This supports biological relevance but is still disease-association evidence, so the JSON limits interpretation to enzyme-activity tendency rather than disease prediction.PubMed 16816108functional assay · directA controlled feeding study on choline requirement noted rs7946 as a functionally significant PEMT SNP, but also reported that the low-choline response was not explained by this SNP alone. This supports a conservative certainty score and highlights that diet, sex, hormones, and other variants can affect practical interpretation.

Common symptoms people report

  • poor tolerance to low-choline intake
  • uncertainty around egg or choline-rich food response
  • concern about liver support or fat handling
  • high overlap with methylation-related issues

Biomarkers to validate

ALT and AST

Useful for basic liver-status context.

GGT

Adds context for liver stress and metabolic burden.

Homocysteine

Helps assess overlap with methylation demand.

Where DNA analysis helps

DNA can highlight when choline-related pathways may deserve more attention than generic nutrition advice provides. The purpose is to prioritize follow-up, not to declare a fixed nutrient protocol from genetics alone.

Example Insight

Your choline-support pathway may depend more heavily on dietary intake than expected.

Suggested validation: ALT, GGT, and homocysteine.

What to do next

  • Check liver markers and methylation context before assuming choline insufficiency.
  • Review PEMT together with BHMT and MTHFR when methylation demand is part of the picture.
  • Use diet history and biomarker context to decide whether the pathway is active.

Upload your DNA file and receive a structured metabolic pathway analysis with prioritized insights and suggested validation markers.

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Related pages

BHMT

BHMT gene function

MTHFR

MTHFR gene metabolism

Choline status

choline status and methyl donor support

Liver enzymes

liver enzymes and choline support

Choline and phosphatidylcholine pathway

choline and phosphatidylcholine pathway

B12 transport and recycling pathway

B12 transport and recycling pathway

Can DNA predict metabolism?

can DNA predict metabolism

23andMe vs Metastate metabolism report

23andMe vs Metastate metabolism report

Related symptom angle

Brain fog metabolism causes

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