chr4-73440725-A-C

Variant names:

• chr4-73440725-A-C
• rs764357434
• NM_001134.3:c.394A>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001134.3(AFP):​c.394A>C​(p.Thr132Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: AFP NM_001134.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.771
• Publications: 0 publications found

Genes affected

AFP (HGNC:317): (alpha fetoprotein) This gene encodes alpha-fetoprotein, a major plasma protein produced by the yolk sac and the liver during fetal life. Alpha-fetoprotein expression in adults is often associated with hepatocarcinoma and with teratoma, and has prognostic value for managing advanced gastric cancer. However, hereditary persistance of alpha-fetoprotein may also be found in individuals with no obvious pathology. The protein is thought to be the fetal counterpart of serum albumin, and the alpha-fetoprotein and albumin genes are present in tandem in the same transcriptional orientation on chromosome 4. Alpha-fetoprotein is found in monomeric as well as dimeric and trimeric forms, and binds copper, nickel, fatty acids and bilirubin. The level of alpha-fetoprotein in amniotic fluid is used to measure renal loss of protein to screen for spina bifida and anencephaly. [provided by RefSeq, Oct 2019]

AFP Gene-Disease associations (from GenCC):

• hereditary persistence of alpha-fetoprotein

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• congenital deficiency in alpha-fetoprotein

  Inheritance: AR Classification: NO_KNOWN Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.089172155).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001134.3. 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
	AFP	NM_001134.3	MANE Select	c.394A>C	p.Thr132Pro	missense	Exon 4 of 15	NP_001125.1	P02771
	AFP	NM_001354717.2		c.-5+66A>C		intron	N/A	NP_001341646.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AFP	ENST00000395792.7	TSL:1 MANE Select	c.394A>C	p.Thr132Pro	missense	Exon 4 of 15	ENSP00000379138.2	P02771
	AFP	ENST00000226359.2	TSL:5	c.394A>C	p.Thr132Pro	missense	Exon 4 of 14	ENSP00000226359.2	J3KMX3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

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

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.073
BayesDel_addAF	Benign	-0.24	T
BayesDel_noAF	Benign	-0.59
CADD	Benign	10
DANN	Benign	0.57
DEOGEN2	Benign	0.14	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.15	N
LIST_S2	Benign	0.57	T
M_CAP	Benign	0.0051	T
MetaRNN	Benign	0.089	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.4	L
PhyloP100		-0.77
PrimateAI	Benign	0.28	T
PROVEAN	Benign	-1.1	N
REVEL	Benign	0.014
Sift	Benign	0.28	T
Sift4G	Benign	0.21	T
Polyphen		0.52	P
Vest4		0.16
MutPred		0.48		Gain of catalytic residue at P131 (P = 0.0207)
MVP		0.23
MPC		0.10
ClinPred		0.65	D
GERP RS		-2.4
Varity_R		0.32
gMVP		0.19
Mutation Taster		=94/6	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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: rs764357434; hg19: chr4-74306442;