rs776977023

Variant names:

• chr1-119727097-A-G
• rs776977023
• NM_006623.4:c.505A>G

Your query was ambiguous. Multiple possible variants found:

• chr1-119727097-A-G
• chr1-119727097-A-T

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_006623.4(PHGDH):​c.505A>G​(p.Met169Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000697 in 1,435,384 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M169L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.0e-7 (0 hom.)
• Consequence: PHGDH NM_006623.4 missense
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 7.33
• Publications: 1 publications found

Genes affected

PHGDH (HGNC:8923): (phosphoglycerate dehydrogenase) This gene encodes the enzyme which is involved in the early steps of L-serine synthesis in animal cells. L-serine is required for D-serine and other amino acid synthesis. The enzyme requires NAD/NADH as a cofactor and forms homotetramers for activity. Mutations in this gene have been found in a family with congenital microcephaly, psychomotor retardation and other symptoms. Multiple alternatively spliced transcript variants have been found, however the full-length nature of most are not known. [provided by RefSeq, Aug 2011]

PHGDH Gene-Disease associations (from GenCC):

• neurometabolic disorder due to serine deficiency

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• PHGDH deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Orphanet
• Neu-Laxova syndrome 1

  Inheritance: AR Classification: MODERATE Submitted by: G2P
• Neu-Laxova syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.925

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006623.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PHGDH	NM_006623.4	MANE Select	c.505A>G	p.Met169Val	missense	Exon 5 of 12	NP_006614.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PHGDH	ENST00000641023.2	MANE Select	c.505A>G	p.Met169Val	missense	Exon 5 of 12	ENSP00000493175.1	O43175
	PHGDH	ENST00000369409.9	TSL:1	c.505A>G	p.Met169Val	missense	Exon 5 of 12	ENSP00000358417.5	A0A2C9F2M7
	PHGDH	ENST00000641597.1		c.505A>G	p.Met169Val	missense	Exon 8 of 15	ENSP00000493382.1	O43175

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.97e-7 AC: 1 AN: 1435384 Hom.: 0 Cov.: 25 AF XY: 0.00000140 AC XY: 1 AN XY: 715698

African (AFR) AF: 0.00 AC: 0 AN: 32984

American (AMR) AF: 0.00 AC: 0 AN: 44690

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25998

East Asian (EAS) AF: 0.00 AC: 0 AN: 39578

South Asian (SAS) AF: 0.00 AC: 0 AN: 85760

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53410

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5716

European-Non Finnish (NFE) AF: 9.19e-7 AC: 1 AN: 1087710

Other (OTH) AF: 0.00 AC: 0 AN: 59538

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.44
BayesDel_addAF	Pathogenic	0.39	D
BayesDel_noAF	Pathogenic	0.33
CADD	Pathogenic	27
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.89	D
Eigen	Pathogenic	0.76
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Uncertain	0.15	D
MetaRNN	Pathogenic	0.93	D
MetaSVM	Uncertain	0.39	D
MutationAssessor	Uncertain	2.3	M
PhyloP100		7.3
PrimateAI	Uncertain	0.59	T
PROVEAN	Uncertain	-3.5	D
REVEL	Pathogenic	0.91
Sift	Benign	0.046	D
Sift4G	Benign	0.063	T
Polyphen		1.0	D
Vest4		0.69
MutPred		0.82		Gain of methylation at K170 (P = 0.025)
MVP		0.89
MPC		0.84
ClinPred		0.97	D
GERP RS		5.8
RBP_binding_hub_radar		1.0
RBP_regulation_power_radar		2.7
Varity_R		0.85
gMVP		0.87
Mutation Taster		=20/80	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs776977023; hg19: chr1-120269720;