5-87380543-T-C

Variant names:

• chr5-87380543-T-C
• rs878854571
• NM_002890.3:c.2638T>C

Variant summary

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

The NM_002890.3(RASA1):​c.2638T>C​(p.Ser880Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S880C) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RASA1 NM_002890.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.80
• Publications: 0 publications found

Genes affected

RASA1 (HGNC:9871): (RAS p21 protein activator 1) The protein encoded by this gene is located in the cytoplasm and is part of the GAP1 family of GTPase-activating proteins. The gene product stimulates the GTPase activity of normal RAS p21 but not its oncogenic counterpart. Acting as a suppressor of RAS function, the protein enhances the weak intrinsic GTPase activity of RAS proteins resulting in the inactive GDP-bound form of RAS, thereby allowing control of cellular proliferation and differentiation. Mutations leading to changes in the binding sites of either protein are associated with basal cell carcinomas. Mutations also have been associated with hereditary capillary malformations (CM) with or without arteriovenous malformations (AVM) and Parkes Weber syndrome. Alternative splicing results in two isoforms where the shorter isoform, lacking the N-terminal hydrophobic region but retaining the same activity, appears to be abundantly expressed in placental but not adult tissues. [provided by RefSeq, May 2012]

CCNH (HGNC:1594): (cyclin H) The protein encoded by this gene belongs to the highly conserved cyclin family, whose members are characterized by a dramatic periodicity in protein abundance through the cell cycle. Cyclins function as regulators of CDK kinases. Different cyclins exhibit distinct expression and degradation patterns which contribute to the temporal coordination of each mitotic event. This cyclin forms a complex with CDK7 kinase and ring finger protein MAT1. The kinase complex is able to phosphorylate CDK2 and CDC2 kinases, thus functions as a CDK-activating kinase (CAK). This cyclin and its kinase partner are components of TFIIH, as well as RNA polymerase II protein complexes. They participate in two different transcriptional regulation processes, suggesting an important link between basal transcription control and the cell cycle machinery. A pseudogene of this gene is found on chromosome 4. Alternate splicing results in multiple transcript variants.[provided by RefSeq, Nov 2010]

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, 0.841

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002890.3. 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
	RASA1	NM_002890.3	MANE Select	c.2638T>C	p.Ser880Pro	missense	Exon 20 of 25	NP_002881.1	P20936-1
	RASA1	NM_022650.3		c.2107T>C	p.Ser703Pro	missense	Exon 20 of 25	NP_072179.1	P20936-2
	CCNH	NM_001364075.2		c.933+14501A>G		intron	N/A	NP_001351004.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RASA1	ENST00000274376.11	TSL:1 MANE Select	c.2638T>C	p.Ser880Pro	missense	Exon 20 of 25	ENSP00000274376.6	P20936-1
	RASA1	ENST00000456692.6	TSL:1	c.2107T>C	p.Ser703Pro	missense	Exon 20 of 25	ENSP00000411221.2	P20936-2
	RASA1	ENST00000515800.6	TSL:1	n.*1163T>C		non_coding_transcript_exon	Exon 21 of 26	ENSP00000423395.2	P20936-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.38	D
BayesDel_noAF	Pathogenic	0.30
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.75	D
Eigen	Uncertain	0.61
Eigen_PC	Uncertain	0.65
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D
M_CAP	Uncertain	0.11	D
MetaRNN	Pathogenic	0.84	D
MetaSVM	Uncertain	0.056	D
MutationAssessor	Benign	1.8	L
PhyloP100		7.8
PrimateAI	Pathogenic	0.85	D
PROVEAN	Benign	-2.0	N
REVEL	Pathogenic	0.71
Sift	Benign	0.12	T
Sift4G	Benign	0.13	T
Polyphen		0.96	D
Vest4		0.77
MutPred		0.71		Loss of MoRF binding (P = 0.0696)
MVP		0.95
MPC		1.7
ClinPred		0.91	D
GERP RS		5.5
Varity_R		0.85
gMVP		0.96
Mutation Taster		=32/68	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.13		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: rs878854571; hg19: chr5-86676360;