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| Skeletal dysplasia v0.275 | FUZ |
Chirag Patel gene: FUZ was added gene: FUZ was added to Skeletal dysplasia. Sources: Literature Mode of inheritance for gene: FUZ was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: FUZ were set to PMID: 38702430, 29068549, 34719684 Phenotypes for gene: FUZ were set to Ciliopathy_MONDO_0005308; skeletal ciliopathy Review for gene: FUZ was set to GREEN gene: FUZ was marked as current diagnostic Added comment: FUZ is crucial for the transport of components to the primary cilium and potentially promotes protein complex assembly necessary for downstream cilium formation and function. Previous studies have shown complete knockout of Fuz in a mouse model leads to prenatal lethality, coronal craniosynostosis, micrognathia, facial malformations, eye, and heart defects. Suggested as a skeletal ciliopathy disorder gene. PMID: 38702430 1 individual (from family with 2 affecteds) with orofaciodigital syndrome like phenotype (dysmorphism, bilateral foot preaxial polysyndactyly, right foot postaxial polysyndactyly, broad thumbs, bilateral 5th finger clinodactyly narrow chest, partial AVSD). They found a homozygous missense variant in FUZ [p.(Glu201Lys)]. Parents were heterozygous carriers. A sibling died at 18mths and had complete AVSD, bilateral cleft lip and palate, right 5th finger clinodactyly, and medially deviated/broad great toes. 1 fetus with orofaciodigital syndrome like phenotype (right cleft lip, 4 limb polydactyly, bilateral duplicated hallux, and AVSD). They found compound heterozygous variants in FUZ [p.(Val209_Leu212del) and p.(Glu201Lys)]. PMID: 29068549 1 fetus with lethal short-rib polydactyly syndrome II-like phenotype and a homozygous variant (c.98_111+9del) in FUZ. 1 individual with asphyxiating thoracic dystrophy (ATD) with polydactyly and a (unclear if homozygous) missense variant [p.(Arg284Leu)] in FUZ. PMID: 34719684 Monozygotic twins with craniosynostosis (1 x metopic, 1 x metopic/coronal) and a homozygous missense variant in FUZ [p.(Arg284Pro)]. They cultured primary osteoblasts and mouse embryonic fibroblasts from Fuz mutant mice. Loss of Fuz resulted in increased osteoblastic mineralisation, suggesting that the FUZ protein normally acts as a negative regulator of osteogenesis. Sources: Literature |
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| Skeletal dysplasia v0.267 | RAB34 |
Elena Savva gene: RAB34 was added gene: RAB34 was added to Skeletal dysplasia. Sources: Literature Mode of inheritance for gene: RAB34 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: RAB34 were set to 37619988; 37384395 Phenotypes for gene: RAB34 were set to Multiple congenital anomalies, (MONDO:0019042), RAB34-related Review for gene: RAB34 was set to GREEN Added comment: PMID: 37619988 - Compound heterozygous variants identified in RAB34 in a fetus with multiple malformations, including posterior neck edema, micrognathia, low-set and small ears, auricular hypoplasia, cleft lip and palate, short extremities, and a combination of rarely occurring pre- and postaxial polydactyly. - Rab34-/- mice displayed a ciliopathy phenotype with cleft palate and polydactyly. PMID: 37384395 - Biallelic variants in RAB34 were identified in 3 unrelated families. Affected individuals presented a novel form of OFDS accompanied by cardiac, cerebral, skeletal (eg. Shortening of long bones), and anorectal defects. Onset is prenatal (multiple developmental defects including short femur, polydactyly, heart malformations, kidney malformations, and brain malformations), resulting in medical termination for three probands. Sources: Literature |
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| Skeletal dysplasia v0.234 | ERI1 |
Elena Savva gene: ERI1 was added gene: ERI1 was added to Skeletal dysplasia. Sources: Literature Mode of inheritance for gene: ERI1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ERI1 were set to 37352860 Phenotypes for gene: ERI1 were set to Spondyloepimetaphyseal dysplasia (MONDO#0100510), ERI1-related, Intellectual disability (MONDO#0001071), ERI1-related Review for gene: ERI1 was set to GREEN Added comment: PMID: 37352860 - 8 individuals from 7 unrelated families - Patients with biallelic missense show a MORE severe spondyloepimetaphyseal dysplasia, syndactyly, brachydactyly/clinodactyly/camptodactyly - Patients with biallelic null/whole gene deletion had mild ID and digit anomalies including brachydactyly/clinodactyly/camptodactyly - Patient chet for a missense and PTC variant has a blended phenotype with short stature, syndactyly, brachydactyly/clinodactyly/camptodactyly, mild ID and failure to thrive - Missense variants were functionally shown to not be able to rescue 5.8S rRNA processing in KO HeLa cells - K/O mice had neonatal lethality with growth defects, brachydactyly. Skeletal-specific K/O had mild platyspondyly, had more in keeping with patients with null variants than missense More severe phenotype hypothesised due to "exonuclease-dead proteins may compete for the target RNA molecules with other exonucleases that have functional redundancy with ERI1, staying bound to those RNA molecules" Sources: Literature |
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| Skeletal dysplasia v0.232 | TAPT1 | Paul De Fazio reviewed gene: TAPT1: Rating: AMBER; Mode of pathogenicity: None; Publications: 36697720, 36652330; Phenotypes: Osteochondrodysplasia, complex lethal, Symoens-Barnes-Gistelinck type (MIM#616897); Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal; Current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Skeletal dysplasia v0.227 | CBFB |
Ain Roesley gene: CBFB was added gene: CBFB was added to Skeletal dysplasia. Sources: Literature Mode of inheritance for gene: CBFB was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: CBFB were set to 36241386 Phenotypes for gene: CBFB were set to cleidocranial dysplasia (MONDO#0007340), CBFB-related Penetrance for gene: CBFB were set to Complete Review for gene: CBFB was set to GREEN gene: CBFB was marked as current diagnostic Added comment: 5 families with 8 individuals, including 2 de novos and 1 intragenic exon 4 deletion In 1 family, the mother did not report skeletal concerns but had dental abnormalities during childhood Sources: Literature |
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| Skeletal dysplasia v0.219 | FAM20B |
Zornitza Stark gene: FAM20B was added gene: FAM20B was added to Skeletal dysplasia. Sources: Literature Mode of inheritance for gene: FAM20B was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: FAM20B were set to 30847897; 30105814; 22732358; 27405802 Phenotypes for gene: FAM20B were set to Desbuquois dysplasia MONDO:0015426 Review for gene: FAM20B was set to AMBER Added comment: Two siblings from a single family with neonatal short limb dysplasia resembling Desbuquois dysplasia. One of the siblings underwent genetic testing and compound heterozygous variants were identified in FAM20B ((NM_014864: c.174_178delTACCT p.T59Afs*19/c.1038delG p.N347Mfs*4). Multiple mouse models reported with skeletal abnormalities. Sources: Literature |
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| Skeletal dysplasia v0.209 | ACVR1 |
Zornitza Stark changed review comment from: Fibrodysplasia ossificans progressiva is a rare autosomal dominant disease with complete penetrance involving progressive ossification of skeletal muscle, fascia, tendons, and ligaments. FOP has a prevalence of approximately 1 in 2 million worldwide, and shows no geographic, ethnic, racial, or gender preference. Individuals with FOP appear normal at birth except for great toe abnormalities: the great toes are short, deviated, and monophalangic. Ossification occurs progressively over the course of a lifetime in an inevitable and unpredictable episodic manner. Multiple unrelated families reported. The R206H variant is recurrent. Note variants in this gene are also associated with congenital heart disease, PMID 29089047.; to: Fibrodysplasia ossificans progressiva is a rare autosomal dominant disease with complete penetrance involving progressive ossification of skeletal muscle, fascia, tendons, and ligaments. FOP has a prevalence of approximately 1 in 2 million worldwide, and shows no geographic, ethnic, racial, or gender preference. Individuals with FOP appear normal at birth except for great toe abnormalities: the great toes are short, deviated, and monophalangic. Ossification occurs progressively over the course of a lifetime in an inevitable and unpredictable episodic manner. Multiple unrelated families reported. The R206H variant is recurrent. Clinical trial with palovarotene. Note variants in this gene are also associated with congenital heart disease, PMID 29089047. |
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| Skeletal dysplasia v0.158 | BNIP1 |
Bryony Thompson gene: BNIP1 was added gene: BNIP1 was added to Skeletal dysplasia. Sources: Literature Mode of inheritance for gene: BNIP1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: BNIP1 were set to 35266227; 31344970 Phenotypes for gene: BNIP1 were set to spondyloepiphyseal dysplasia MONDO:0016761 Review for gene: BNIP1 was set to AMBER Added comment: Two apparently unrelated cases with spondyloepiphyseal dysplasia from India were identified with the same variant (c.84+3A>T). The kindred coefficient comparison of the 2 cases exome data suggested they were unrelated, however there was a stretch of shared homozygosity suggesting remote consanguinity. ~80% aberrantly spliced BNIP1 pre-mRNAs, reduced BNIP1 mRNA level to ~80%, and BNIP1 protein level reduction by ~50% were detected in one of the cases fibroblasts. A block at the terminal stage of autolysosome formation and/or clearance in patient fibroblasts was suggested based on the data. A drosophila model of the BNIP1 orthologue Sec20 also demonstrated defective autolysosome formation. Sources: Literature |
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| Skeletal dysplasia v0.153 | SEMA3A |
Krithika Murali gene: SEMA3A was added gene: SEMA3A was added to Skeletal dysplasia. Sources: Literature Mode of inheritance for gene: SEMA3A was set to BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal Publications for gene: SEMA3A were set to 28075028; 33369061; 20301509; 21059704; 24124006; 22927827 Phenotypes for gene: SEMA3A were set to {Hypogonadotropic hypogonadism 16 with or without anosmia - MIM#614897; congenital heart disease; short stature Review for gene: SEMA3A was set to GREEN Added comment: Heterozygous variants associated with isolated GnRH deficiency with or without anosmia (Kallman syndrome like). More severe phenotype with biallelic SEMA3A variants reported including postnatal short stature and congenital heart defects in 3/3 published, unrelated individuals. PMID 33369061 Gileta et al 2021 - report x1 patient. Female proband was compound heterozygote for a nonsense variant and a multiexonic deletion of SEMA3A. Presents with postnatal short stature, congenital cardiac anomalies, dysmorphic features, hypogonadotrophic hypogonadism and anosmia. PMID 28075028 Baumann et al 2017 - report x1 patient. Homozygous LoF variants identified in a proband from a consanguineous Turkish family. Noted at birth to have a high-positioned scapulae, deformed ribs and a lateral clavicular hook. The patient also had upper/lower limb contractures and aberrant right subclavian artery. Mild facial dysmorphism, micropenis and hypogonadotrophic hypogonadism also noted in the first week of life. Postnatal short stature (length 50cm at term birth) PMID 24124006 Hofmann et al 2013 - first reported biallelic variants in a proband with postnatal short stature, skeletal anomalies of the thorax, congenital heart defect and camptodactyly Sources: Literature |
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| Skeletal dysplasia v0.150 | SMAD6 |
Chris Richmond gene: SMAD6 was added gene: SMAD6 was added to Skeletal dysplasia. Sources: Expert Review Mode of inheritance for gene: SMAD6 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: SMAD6 were set to 31138930 Phenotypes for gene: SMAD6 were set to 179300 Penetrance for gene: SMAD6 were set to Incomplete Review for gene: SMAD6 was set to GREEN gene: SMAD6 was marked as current diagnostic Added comment: Yang et al. (2019) performed exome sequencing on 117 patients with sporadic RUS and found significant enrichment for loss-of-function variants in the SMAD6 gene. Identified 22 SMAD6 rare variants (with a minor allele frequency of less than 0.0001) that occurred in 22 nonsyndromic RUS patients. Logistic regression showed that SMAD6 loss-of-function variants were significantly associated with increased risk of nonsyndromic RUS (OR 430; 95% CI 237.5-780.1; p less than 0.000001). Some inherited from unaffected parents. Sources: Expert Review |
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| Skeletal dysplasia v0.83 | EN1 |
Zornitza Stark changed review comment from: Three unrelated families reported (though two shown to be related by descent) with predominantly a skeletal phenotype comprising mesomelic shortening and deformation of the lower limbs due to severe hypoplasia of the tibia and fibula. This was accompanied by abnormalities of the digits of the hands and feet, with cutaneous and osseous syndactyly as well as dysplastic, missing, and/or volar nails. In addition, genitourinary anomalies were observed in some. Homozygous deletions identified in all, with the minimal deleted region being a 27-kb interval (chr2: 118,561,492-118,589,320) located approximately 300 kb upstream of the EN1 gene. Mouse model recapitulated the phenotype. Sources: Literature; to: Three unrelated families reported (though two shown to be related by descent) with predominantly a skeletal phenotype comprising mesomelic shortening and deformation of the lower limbs due to severe hypoplasia of the tibia and fibula. This was accompanied by abnormalities of the digits of the hands and feet, with cutaneous and osseous syndactyly as well as dysplastic, missing, and/or volar nails. In addition, genitourinary anomalies were observed in some. Homozygous deletions identified in all, with the minimal deleted region being a 27-kb interval (chr2: 118,561,492-118,589,320) located approximately 300 kb upstream of the EN1 gene. Mouse model recapitulated the phenotype. An additional fourth individual had cerebellar hypoplasia in addition to the skeletal phenotype, and a bi-allelic LoF variant. Sources: Literature |
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| Skeletal dysplasia v0.82 | EN1 |
Zornitza Stark gene: EN1 was added gene: EN1 was added to Skeletal dysplasia. Sources: Literature SV/CNV, 5'UTR tags were added to gene: EN1. Mode of inheritance for gene: EN1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: EN1 were set to 33568816 Phenotypes for gene: EN1 were set to ENDOVE syndrome, limb-only type, MIM# 619217 Review for gene: EN1 was set to GREEN Added comment: Three unrelated families reported (though two shown to be related by descent) with predominantly a skeletal phenotype comprising mesomelic shortening and deformation of the lower limbs due to severe hypoplasia of the tibia and fibula. This was accompanied by abnormalities of the digits of the hands and feet, with cutaneous and osseous syndactyly as well as dysplastic, missing, and/or volar nails. In addition, genitourinary anomalies were observed in some. Homozygous deletions identified in all, with the minimal deleted region being a 27-kb interval (chr2: 118,561,492-118,589,320) located approximately 300 kb upstream of the EN1 gene. Mouse model recapitulated the phenotype. Sources: Literature |
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| Skeletal dysplasia v0.65 | TONSL |
Zornitza Stark gene: TONSL was added gene: TONSL was added to Skeletal dysplasia. Sources: Literature Mode of inheritance for gene: TONSL was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TONSL were set to 30773277; 30773278; 32959051 Phenotypes for gene: TONSL were set to Spondyloepimetaphyseal dysplasia, sponastrime type OMIM:271510; spondyloepimetaphyseal dysplasia, sponastrime type MONDO:0010068 Review for gene: TONSL was set to GREEN Added comment: Associated with Spondyloepimetaphyseal dysplasia, sponastrime type MIM#271510 (AR) in OMIM. PMID: 30773277 - Burrage et al 2019 - identified, using WES or Sanger sequencing, compound heterozygous variants in TONSL in 9 individuals (8 families) with SPONASTRIME dysplasia. 4 other probands with SPONASTRIME dysplasia did not have biallelic variants in TONSL or in MMS22L, but two of them did have a single heterozygous variants in TONSL. The authors say they cannot exclude deep intronic, promotor variants or large intragenic rearrangements/deletions in these patients. An additional 4 individuals (3 families) with short stature of varied severity and spondylometaphyseal dysplasia with or without immunologic and hematologic abnormalities were also found to have compound heterozygous variants in TONSL. PMID: 30773278 - Chang et al 2019 - Using WES they identified homozygous or compound heterozygous TONSL variants in 10 of 13 individuals (9 families) with SPONASTRIME dysplasia. PMID: 32959051 - Micale et al 2020 - report a 9-year-old Italian girl with typical SPONASTRIME dysplasia who was found to have two novel missense variants in TONSL. Each parent was heterozygous for one of the variants. Both variants were found to be very rare in the gnomad database. Patient-derived fibroblasts show increased levels of spontaneous chromosomal breaks, reduced cell proliferation and enhanced apoptosis. Sources: Literature |
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| Skeletal dysplasia v0.19 | TAPT1 | Zornitza Stark reviewed gene: TAPT1: Rating: AMBER; Mode of pathogenicity: None; Publications: 26365339; Phenotypes: Osteochondrodysplasia, complex lethal, Symoens-Barnes-Gistelinck type (MIM#616897); Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Skeletal dysplasia v0.0 | TAPT1 |
Zornitza Stark gene: TAPT1 was added gene: TAPT1 was added to Skeletal dysplasia. Sources: Expert Review,Expert Review Green Mode of inheritance for gene: TAPT1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TAPT1 were set to 26365339 Phenotypes for gene: TAPT1 were set to Osteochondrodysplasia, complex lethal, Symoens-Barnes-Gistelinck type 616897 |
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| Skeletal dysplasia v0.0 | COMP |
Zornitza Stark gene: COMP was added gene: COMP was added to Skeletal dysplasia. Sources: Emory Genetics Laboratory,NHS GMS,Expert Review Green,Eligibility statement prior genetic testing,Expert,Illumina TruGenome Clinical Sequencing Services Mode of inheritance for gene: COMP was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Phenotypes for gene: COMP were set to Epiphyseal dysplasia, multiple, 1 132400; Pseudoachondroplasia 177170 |
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