chr21-39178550-G-A

Position:

• chr21-39178550-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_003720.4(PSMG1):​c.554C>T​(p.Pro185Leu) 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. 12/21 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: PSMG1 NM_003720.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.90

Genes affected

PSMG1 (HGNC:3043): (proteasome assembly chaperone 1) Enables molecular adaptor activity. Involved in chaperone-mediated protein complex assembly. Located in several cellular components, including Golgi apparatus; endoplasmic reticulum; and nucleoplasm. Part of chaperone complex. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.17966506).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PSMG1	NM_003720.4	c.554C>T	p.Pro185Leu	missense_variant	5/7	ENST00000331573.8	NP_003711.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PSMG1	ENST00000331573.8	c.554C>T	p.Pro185Leu	missense_variant	5/7	1	NM_003720.4	ENSP00000329915	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 17, 2023

The c.554C>T (p.P185L) alteration is located in exon 5 (coding exon 5) of the PSMG1 gene. This alteration results from a C to T substitution at nucleotide position 554, causing the proline (P) at amino acid position 185 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.092
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.43	T;.
Eigen	Benign	-0.095
Eigen_PC	Benign	-0.056
FATHMM_MKL	Benign	0.62	D
LIST_S2	Uncertain	0.93	D;D
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.18	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.3	M;.
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.31	T
PROVEAN	Uncertain	-3.8	D;D
REVEL	Benign	0.051
Sift	Uncertain	0.015	D;D
Sift4G	Uncertain	0.022	D;D
Polyphen		0.22	B;B
Vest4		0.28
MutPred		0.31		Loss of disorder (P = 0.0382);.;
MVP		0.50
MPC		0.34
ClinPred		0.77	D
GERP RS		4.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.11
gMVP		0.40

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr21-40550476;