Mutagenetix > Incidental Mutation

Incidental Mutation 'G4846:Col4a2'

527

Institutional Source

Beutler Lab

Gene Symbol

Col4a2

Ensembl Gene

ENSMUSG00000031503

Gene Name

collagen, type IV, alpha 2

Synonyms

Col4a-2

Accession Numbers

Essential gene?

Essential (E-score: 1.000) question?

Stock #

G4846 (G3) of strain Worker

Quality Score

Status

Validated

Chromosome

Chromosomal Location

11362805-11499287 bp(+) (GRCm39)

Type of Mutation

splice site

DNA Base Change (assembly)

T to C at 11458872 bp (GRCm39)

Zygosity

Homozygous

Amino Acid Change

Ref Sequence

ENSEMBL: ENSMUSP00000033899 (fasta)

Gene Model

predicted gene model for transcript(s): [ENSMUST00000033899]

AlphaFold

P08122

Predicted Effect

probably benign
Transcript: ENSMUST00000033899

SMART Domains

Protein: ENSMUSP00000033899
Gene: ENSMUSG00000031503

Domain	Start	End	E-Value	Type
signal peptide	1	28	N/A	INTRINSIC
Pfam:Collagen	56	119	1.2e-10	PFAM
Pfam:Collagen	112	174	3.9e-8	PFAM
low complexity region	193	229	N/A	INTRINSIC
Pfam:Collagen	289	348	1.3e-10	PFAM
low complexity region	370	389	N/A	INTRINSIC
low complexity region	427	445	N/A	INTRINSIC
Pfam:Collagen	488	546	2e-10	PFAM
Pfam:Collagen	590	655	4.5e-9	PFAM
low complexity region	665	673	N/A	INTRINSIC
Pfam:Collagen	674	731	3.5e-10	PFAM
Pfam:Collagen	714	775	4.3e-10	PFAM
Pfam:Collagen	773	831	1.5e-10	PFAM
Pfam:Collagen	861	935	8.1e-10	PFAM
Pfam:Collagen	915	976	1.1e-9	PFAM
Pfam:Collagen	978	1038	2.6e-8	PFAM
Pfam:Collagen	1027	1091	1.7e-10	PFAM
Pfam:Collagen	1094	1155	5.5e-11	PFAM
Pfam:Collagen	1147	1211	1e-10	PFAM
Pfam:Collagen	1271	1340	2.1e-8	PFAM
Pfam:Collagen	1330	1392	7.1e-10	PFAM
C4	1484	1591	7.85e-59	SMART
C4	1592	1706	7.65e-71	SMART

Predicted Effect

noncoding transcript
Transcript: ENSMUST00000145295

SMART Domains

Protein: ENSMUSP00000114737
Gene: ENSMUSG00000031503

Domain	Start	End	E-Value	Type
Pfam:Collagen	6	55	9.7e-8	PFAM
Pfam:Collagen	81	140	4.4e-12	PFAM
Pfam:Collagen	145	210	2.7e-8	PFAM
Pfam:Collagen	184	239	2.9e-8	PFAM
low complexity region	280	293	N/A	INTRINSIC

Predicted Effect

noncoding transcript
Transcript: ENSMUST00000148654

Coding Region Coverage

1x: 77.7%
3x: 53.3%

Het Detection Efficiency

29.1%

Validation Efficiency

90% (104/115)

MGI Phenotype

FUNCTION: This gene encodes the alpha-2 subunit of the type IV collagens, an essential component of basement membranes. The encoded protein forms a triple helical heterotrimer comprised of alpha-1 and alpha-2 subunits that assembles into a type IV collagen network. Canstatin, a peptide derived fom the C-terminus of the collagen chain, is a matrikine that has been shown to inhibit angiogenesis. Homozygous knockout mice for this gene exhibit impaired basement membrane integrity and embryonic lethality. This gene shares a bi-directional promoter with a related gene on chromosome 8. [provided by RefSeq, Nov 2015]
PHENOTYPE: ENU-induced missense mutations of this gene result in a variable phenotype affecting the eye, brain and vascular stability in heterozygotes, and fetal or postnatal survival in homozygotes. [provided by MGI curators]

Allele List at MGI

All alleles(10) : Targeted, knock-out(1) Gene trapped(6) Chemically induced(3)

Other mutations in this stock

Total: 11 list
Gene	Ref	Var	Chr/Loc	Mutation	Predicted Effect	Zygosity
2700049A03Rik	A	G	12: 71,184,683 (GRCm39)	I24V	probably benign	Het
Cyp3a13	C	T	5: 137,897,085 (GRCm39)	E410K	possibly damaging	Het
Gm20518	A	T	16: 17,654,509 (GRCm39)		probably benign	Homo
Nbea	T	A	3: 55,994,918 (GRCm39)	D166V	probably damaging	Het
Or5au1	T	A	14: 52,273,434 (GRCm39)	M45L	probably benign	Het
Or6c88	A	T	10: 129,407,039 (GRCm39)	I172F	probably damaging	Het
Plxna4	T	A	6: 32,169,207 (GRCm39)	D1330V	probably damaging	Het
Ppl	A	G	16: 4,905,070 (GRCm39)	S1742P	probably damaging	Homo
Samd4	T	A	14: 47,253,776 (GRCm39)	I80N	probably damaging	Het
Spinkl	T	A	18: 44,302,173 (GRCm39)		probably benign	Het
Ttll5	T	A	12: 86,071,018 (GRCm39)	I1297N	probably damaging	Het

Other mutations in Col4a2

Allele	Source	Chr	Coord	Type	Predicted Effect	PPH Score
IGL00088:Col4a2	APN	8	11,493,685 (GRCm39)	missense	probably damaging	1.00
IGL00485:Col4a2	APN	8	11,489,012 (GRCm39)	missense	probably benign
IGL00909:Col4a2	APN	8	11,498,167 (GRCm39)	missense	possibly damaging	0.91
IGL01574:Col4a2	APN	8	11,489,306 (GRCm39)	missense	probably damaging	1.00
IGL01914:Col4a2	APN	8	11,464,754 (GRCm39)	missense	possibly damaging	0.57
IGL02147:Col4a2	APN	8	11,458,140 (GRCm39)	missense	probably benign	0.28
IGL02205:Col4a2	APN	8	11,481,305 (GRCm39)	nonsense	probably null
IGL02423:Col4a2	APN	8	11,483,800 (GRCm39)	missense	probably benign
IGL03131:Col4a2	APN	8	11,475,979 (GRCm39)	missense	probably benign
band	UTSW	8	11,498,225 (GRCm39)	missense	probably benign	0.00
Binder	UTSW	8	11,466,070 (GRCm39)	missense	probably damaging	1.00
IGL03054:Col4a2	UTSW	8	11,498,270 (GRCm39)	missense	probably damaging	0.96
R0087:Col4a2	UTSW	8	11,491,296 (GRCm39)	missense	probably benign
R0124:Col4a2	UTSW	8	11,458,871 (GRCm39)	splice site	probably benign
R0603:Col4a2	UTSW	8	11,464,779 (GRCm39)	missense	probably benign
R0646:Col4a2	UTSW	8	11,481,252 (GRCm39)	missense	probably benign	0.17
R0970:Col4a2	UTSW	8	11,465,438 (GRCm39)	missense	probably benign	0.00
R1738:Col4a2	UTSW	8	11,496,238 (GRCm39)	missense	probably damaging	1.00
R1746:Col4a2	UTSW	8	11,496,020 (GRCm39)	missense	probably benign	0.35
R1826:Col4a2	UTSW	8	11,363,509 (GRCm39)	critical splice donor site	probably null
R1834:Col4a2	UTSW	8	11,452,997 (GRCm39)	missense	probably benign	0.10
R2016:Col4a2	UTSW	8	11,495,086 (GRCm39)	missense	probably benign	0.04
R2017:Col4a2	UTSW	8	11,495,086 (GRCm39)	missense	probably benign	0.04
R2124:Col4a2	UTSW	8	11,466,070 (GRCm39)	missense	probably damaging	1.00
R2137:Col4a2	UTSW	8	11,483,749 (GRCm39)	missense	probably benign
R2207:Col4a2	UTSW	8	11,493,352 (GRCm39)	missense	probably damaging	1.00
R3156:Col4a2	UTSW	8	11,363,414 (GRCm39)	unclassified	probably benign
R4169:Col4a2	UTSW	8	11,479,391 (GRCm39)	missense	probably benign	0.22
R4679:Col4a2	UTSW	8	11,481,337 (GRCm39)	missense	possibly damaging	0.68
R4705:Col4a2	UTSW	8	11,363,504 (GRCm39)	missense	possibly damaging	0.52
R4710:Col4a2	UTSW	8	11,459,462 (GRCm39)	missense	probably benign	0.22
R4716:Col4a2	UTSW	8	11,452,224 (GRCm39)	missense	probably damaging	1.00
R4730:Col4a2	UTSW	8	11,487,590 (GRCm39)	missense	probably benign
R4732:Col4a2	UTSW	8	11,496,197 (GRCm39)	missense	probably benign	0.02
R4732:Col4a2	UTSW	8	11,464,779 (GRCm39)	missense	probably benign
R4733:Col4a2	UTSW	8	11,496,197 (GRCm39)	missense	probably benign	0.02
R4733:Col4a2	UTSW	8	11,464,779 (GRCm39)	missense	probably benign
R4834:Col4a2	UTSW	8	11,456,836 (GRCm39)	nonsense	probably null
R4835:Col4a2	UTSW	8	11,473,570 (GRCm39)	nonsense	probably null
R4953:Col4a2	UTSW	8	11,479,505 (GRCm39)	missense	probably benign	0.02
R5078:Col4a2	UTSW	8	11,493,936 (GRCm39)	missense	probably benign
R5204:Col4a2	UTSW	8	11,448,651 (GRCm39)	splice site	probably null
R5221:Col4a2	UTSW	8	11,498,225 (GRCm39)	missense	probably benign	0.00
R5355:Col4a2	UTSW	8	11,495,984 (GRCm39)	missense	probably damaging	0.96
R5478:Col4a2	UTSW	8	11,448,697 (GRCm39)	missense	probably benign	0.21
R5492:Col4a2	UTSW	8	11,488,608 (GRCm39)	missense	possibly damaging	0.82
R5646:Col4a2	UTSW	8	11,491,281 (GRCm39)	missense	probably damaging	1.00
R5857:Col4a2	UTSW	8	11,475,442 (GRCm39)	missense	probably damaging	1.00
R5948:Col4a2	UTSW	8	11,470,600 (GRCm39)	missense	probably benign	0.21
R6329:Col4a2	UTSW	8	11,496,238 (GRCm39)	missense	probably damaging	1.00
R6496:Col4a2	UTSW	8	11,452,994 (GRCm39)	missense	probably damaging	1.00
R6496:Col4a2	UTSW	8	11,452,993 (GRCm39)	nonsense	probably null
R6531:Col4a2	UTSW	8	11,458,135 (GRCm39)	missense	probably benign	0.00
R7185:Col4a2	UTSW	8	11,449,739 (GRCm39)	missense	probably damaging	0.99
R7196:Col4a2	UTSW	8	11,448,693 (GRCm39)	missense	probably damaging	1.00
R7266:Col4a2	UTSW	8	11,475,542 (GRCm39)	critical splice donor site	probably null
R7308:Col4a2	UTSW	8	11,456,856 (GRCm39)	critical splice donor site	probably null
R7341:Col4a2	UTSW	8	11,448,678 (GRCm39)	missense	probably damaging	0.97
R7394:Col4a2	UTSW	8	11,496,184 (GRCm39)	missense	probably benign	0.00
R7434:Col4a2	UTSW	8	11,471,250 (GRCm39)	missense	probably damaging	1.00
R7606:Col4a2	UTSW	8	11,493,571 (GRCm39)	missense	probably benign	0.00
R7646:Col4a2	UTSW	8	11,495,086 (GRCm39)	missense	probably benign	0.04
R7712:Col4a2	UTSW	8	11,475,376 (GRCm39)	missense	probably benign
R7752:Col4a2	UTSW	8	11,479,358 (GRCm39)	missense	probably benign	0.38
R7844:Col4a2	UTSW	8	11,475,453 (GRCm39)	nonsense	probably null
R7901:Col4a2	UTSW	8	11,479,358 (GRCm39)	missense	probably benign	0.38
R8186:Col4a2	UTSW	8	11,475,542 (GRCm39)	critical splice donor site	probably null
R8331:Col4a2	UTSW	8	11,463,985 (GRCm39)	nonsense	probably null
R8389:Col4a2	UTSW	8	11,498,132 (GRCm39)	missense	probably damaging	1.00
R8547:Col4a2	UTSW	8	11,479,305 (GRCm39)	critical splice acceptor site	probably null
R8927:Col4a2	UTSW	8	11,475,543 (GRCm39)	splice site	probably null
R9051:Col4a2	UTSW	8	11,498,198 (GRCm39)	missense	probably damaging	1.00
R9088:Col4a2	UTSW	8	11,493,227 (GRCm39)	missense	possibly damaging	0.91
R9221:Col4a2	UTSW	8	11,491,943 (GRCm39)	missense	possibly damaging	0.89
R9323:Col4a2	UTSW	8	11,493,413 (GRCm39)	missense	possibly damaging	0.56
R9337:Col4a2	UTSW	8	11,479,346 (GRCm39)	missense	probably benign	0.00
R9377:Col4a2	UTSW	8	11,483,725 (GRCm39)	missense	probably damaging	1.00
R9697:Col4a2	UTSW	8	11,487,628 (GRCm39)	missense	probably benign	0.34
R9701:Col4a2	UTSW	8	11,493,104 (GRCm39)	missense	probably benign	0.00
R9729:Col4a2	UTSW	8	11,496,157 (GRCm39)	missense	probably benign	0.08
R9802:Col4a2	UTSW	8	11,493,104 (GRCm39)	missense	probably benign	0.00

Nature of Mutation

DNA sequencing using the SOLiD technique identified a T to C transition at base pair 11408872 in the Genbank genomic region NC_000074 for the Col4a2 gene on chromosome 8 (TTCTTCACAG -> CTCTTCACAG). The mutation is located within intron 12 from the ATG exon, ten nucleotides to the next exon. The Col4a2 transcript contains 48 total exons. Three transcripts of the Col4a2 gene are displayed on Ensembl The mutation has been confirmed by DNA sequencing using the Sanger method (Figure 1). and Vega.

Protein Function and Prediction

The Col4a2 gene encodes a 1707 amino acid member of the type IV collagen family. Type IV collagen is the major structural component of glomerular basement membranes (GBM), forming a network together with laminins, proteoglycans and entactin/nidogen. Type IV collagens contains an N-terminal domain of about 140 amino acids rich in cysteine and lysine residues (known as the 7S domain; residues 26-183), a collagenous domain of about 1300 residues largely composed of Gly-Xaa-Yaa repeats (residues 184-1479), and a C-terminal noncollagenous (NC1) domain that is roughly 230 amino acids long (residues 1484-1707. Type IV collagen α-chains form heterotrimers to make up single collagen molecule. In turn, collagen heterotrimers dimerize through their NC1 domains and form tetramers through their 7S domains to form a collagen network. Numerous cysteine residues are involved in inter- and intramolecular disulfide bonds. The trimeric structure of the NC1 domains is stabilized by covalent bonds between Lys and Met residues. Canstatin, a cleavage product corresponding to the NC1 domain, possesses both anti-angiogenic and anti-tumor cell activity. It is a ligand for certain integrins, and inhibits proliferation and migration of endothelial cells, reduces mitochondrial membrane potential, and induces apoptosis (Uniprot P08122). Mice heterozygous for Col4a2 mutations display defects in the eye, the brain, kidney function, vascular stability, and viability. Homozygotes do not survive beyond the second trimester.

Posted On

2010-11-02