rs1411529753

Positions:

• chr22-18936208-C-A
• chr22-18936208-C-T

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BP4_Strong

The NM_016335.6(PRODH):​c.80G>T​(p.Arg27Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. 12/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 0)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: PRODH NM_016335.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.24

Genes affected

PRODH (HGNC:9453): (proline dehydrogenase 1) This gene encodes a mitochondrial protein that catalyzes the first step in proline degradation. Mutations in this gene are associated with hyperprolinemia type 1 and susceptibility to schizophrenia 4 (SCZD4). This gene is located on chromosome 22q11.21, a region which has also been associated with the contiguous gene deletion syndromes, DiGeorge and CATCH22. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2010]

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.06059265).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PRODH	NM_016335.6	c.80G>T	p.Arg27Leu	missense_variant	1/14	ENST00000357068.11	NP_057419.5
PRODH	NM_001368250.2	c.-90G>T		5_prime_UTR_variant	1/14		NP_001355179.2
PRODH	NM_001195226.2	c.-52+182G>T		intron_variant			NP_001182155.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PRODH	ENST00000357068.11	c.80G>T	p.Arg27Leu	missense_variant	1/14	1	NM_016335.6	ENSP00000349577	P3

Frequencies

GnomAD3 genomes Cov.: 0

GnomAD3 exomes AF: 0.000115 AC: 3 AN: 26176 Hom.: 0 AF XY: 0.0000619 AC XY: 1 AN XY: 16156

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000548

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000950

Gnomad OTH exome AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 8 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 4

Gnomad4 AFR exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Proline dehydrogenase deficiency Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 07, 2023

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be tolerated. ClinVar contains an entry for this variant (Variation ID: 459919). This variant has not been reported in the literature in individuals affected with PRODH-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This sequence change replaces arginine, which is basic and polar, with leucine, which is neutral and non-polar, at codon 27 of the PRODH protein (p.Arg27Leu). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.57
CADD	Benign	14
DANN	Benign	0.95
DEOGEN2	Benign	0.013	T;T
Eigen	Benign	-1.0
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.070	N
LIST_S2	Benign	0.67	T;.
M_CAP	Benign	0.032	D
MetaRNN	Benign	0.061	T;T
MetaSVM	Benign	-1.0	T
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Pathogenic	0.83	D
PROVEAN	Benign	-1.3	.;N
REVEL	Benign	0.023
Sift	Benign	0.20	.;T
Sift4G	Benign	0.29	T;T
Vest4		0.20
MutPred		0.26		Loss of solvent accessibility (P = 0.0098);Loss of solvent accessibility (P = 0.0098);
MVP		0.040
MPC		0.62
ClinPred		0.14	T
GERP RS		-1.1
gMVP		0.54

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

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

Publications

LitVar

Other links and lift over

dbSNP: rs1411529753; hg19: chr22-18923721;