chr7-66988302-C-T

Variant names:

• chr7-66988302-C-T
• rs115854899
• NM_016038.4:c.*69G>A

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_016038.4(SBDS):​c.*69G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00171 in 1,553,770 control chromosomes in the GnomAD database, including 30 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0086 (14 hom., cov: 32)
  • Exomes 𝑓: 0.00096 (16 hom.)
• Consequence: SBDS NM_016038.4 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.803
• Publications: 0 publications found

Genes affected

SBDS (HGNC:19440): (SBDS ribosome maturation factor) This gene encodes a highly conserved protein that plays an essential role in ribosome biogenesis. The encoded protein interacts with elongation factor-like GTPase 1 to disassociate eukaryotic initiation factor 6 from the late cytoplasmic pre-60S ribosomal subunit allowing assembly of the 80S subunit. Mutations within this gene are associated with the autosomal recessive disorder Shwachman-Bodian-Diamond syndrome. This gene has a closely linked pseudogene that is distally located. [provided by RefSeq, Jan 2017]

SBDS Gene-Disease associations (from GenCC):

• Shwachman-Diamond syndrome

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• Shwachman-Diamond syndrome 1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, PanelApp Australia

ACMG classification

Our verdict: Benign. The variant received -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.66).
• BP6: Variant 7-66988302-C-T is Benign according to our data. Variant chr7-66988302-C-T is described in ClinVar as [Benign]. Clinvar id is 1182411.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00855 (1303/152324) while in subpopulation AFR AF = 0.0283 (1177/41566). AF 95% confidence interval is 0.027. There are 14 homozygotes in GnomAd4. There are 610 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High Homozygotes in GnomAd4 at 14 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SBDS	NM_016038.4	c.*69G>A		3_prime_UTR_variant	Exon 5 of 5	ENST00000246868.7	NP_057122.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SBDS	ENST00000246868.7	c.*69G>A		3_prime_UTR_variant	Exon 5 of 5	1	NM_016038.4	ENSP00000246868.2

Frequencies

GnomAD3 genomes AF: 0.00856 AC: 1303 AN: 152206 Hom.: 13 Cov.: 32

Gnomad AFR AF: 0.0284

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00563

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000620

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00949

Gnomad NFE AF: 0.000279

Gnomad OTH AF: 0.00812

GnomAD4 exome AF: 0.000962 AC: 1348 AN: 1401446 Hom.: 16 Cov.: 24 AF XY: 0.000865 AC XY: 606 AN XY: 700446

African (AFR) AF: 0.0260 AC: 841 AN: 32324

American (AMR) AF: 0.00292 AC: 130 AN: 44482

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25742

East Asian (EAS) AF: 0.0000254 AC: 1 AN: 39356

South Asian (SAS) AF: 0.000473 AC: 40 AN: 84564

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 45332

Middle Eastern (MID) AF: 0.00319 AC: 18 AN: 5646

European-Non Finnish (NFE) AF: 0.000153 AC: 163 AN: 1065444

Other (OTH) AF: 0.00265 AC: 155 AN: 58556

GnomAD4 genome AF: 0.00855 AC: 1303 AN: 152324 Hom.: 14 Cov.: 32 AF XY: 0.00819 AC XY: 610 AN XY: 74488

African (AFR) AF: 0.0283 AC: 1177 AN: 41566

American (AMR) AF: 0.00556 AC: 85 AN: 15286

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5194

South Asian (SAS) AF: 0.000414 AC: 2 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10620

Middle Eastern (MID) AF: 0.0102 AC: 3 AN: 294

European-Non Finnish (NFE) AF: 0.000279 AC: 19 AN: 68032

Other (OTH) AF: 0.00803 AC: 17 AN: 2116

Alfa AF: 0.00927 Hom.: 6

Bravo AF: 0.00942

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:2

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Mar 03, 2015

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.66
CADD	Benign	9.8
DANN	Benign	0.85
PhyloP100		-0.80
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Mutation Taster		=100/0	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: rs115854899; hg19: chr7-66453289;