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Haploinsufficiency of a spliceosomal GTPase encoded by EFTUD2 causes mandibulofacial dysostosis with microcephaly.
Am J Hum Genet. 2012 Feb 10; 90(2):369-77.AJ

Abstract

Mandibulofacial dysostosis with microcephaly (MFDM) is a rare sporadic syndrome comprising craniofacial malformations, microcephaly, developmental delay, and a recognizable dysmorphic appearance. Major sequelae, including choanal atresia, sensorineural hearing loss, and cleft palate, each occur in a significant proportion of affected individuals. We present detailed clinical findings in 12 unrelated individuals with MFDM; these 12 individuals compose the largest reported cohort to date. To define the etiology of MFDM, we employed whole-exome sequencing of four unrelated affected individuals and identified heterozygous mutations or deletions of EFTUD2 in all four. Validation studies of eight additional individuals with MFDM demonstrated causative EFTUD2 mutations in all affected individuals tested. A range of EFTUD2-mutation types, including null alleles and frameshifts, is seen in MFDM, consistent with haploinsufficiency; segregation is de novo in all cases assessed to date. U5-116kD, the protein encoded by EFTUD2, is a highly conserved spliceosomal GTPase with a central regulatory role in catalytic splicing and post-splicing-complex disassembly. MFDM is the first multiple-malformation syndrome attributed to a defect of the major spliceosome. Our findings significantly extend the range of reported spliceosomal phenotypes in humans and pave the way for further investigation in related conditions such as Treacher Collins syndrome.

Authors+Show Affiliations

Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Ontario, Canada.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22305528

Citation

Lines, Matthew A., et al. "Haploinsufficiency of a Spliceosomal GTPase Encoded By EFTUD2 Causes Mandibulofacial Dysostosis With Microcephaly." American Journal of Human Genetics, vol. 90, no. 2, 2012, pp. 369-77.
Lines MA, Huang L, Schwartzentruber J, et al. Haploinsufficiency of a spliceosomal GTPase encoded by EFTUD2 causes mandibulofacial dysostosis with microcephaly. Am J Hum Genet. 2012;90(2):369-77.
Lines, M. A., Huang, L., Schwartzentruber, J., Douglas, S. L., Lynch, D. C., Beaulieu, C., Guion-Almeida, M. L., Zechi-Ceide, R. M., Gener, B., Gillessen-Kaesbach, G., Nava, C., Baujat, G., Horn, D., Kini, U., Caliebe, A., Alanay, Y., Utine, G. E., Lev, D., Kohlhase, J., ... Boycott, K. M. (2012). Haploinsufficiency of a spliceosomal GTPase encoded by EFTUD2 causes mandibulofacial dysostosis with microcephaly. American Journal of Human Genetics, 90(2), 369-77. https://doi.org/10.1016/j.ajhg.2011.12.023
Lines MA, et al. Haploinsufficiency of a Spliceosomal GTPase Encoded By EFTUD2 Causes Mandibulofacial Dysostosis With Microcephaly. Am J Hum Genet. 2012 Feb 10;90(2):369-77. PubMed PMID: 22305528.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Haploinsufficiency of a spliceosomal GTPase encoded by EFTUD2 causes mandibulofacial dysostosis with microcephaly. AU - Lines,Matthew A, AU - Huang,Lijia, AU - Schwartzentruber,Jeremy, AU - Douglas,Stuart L, AU - Lynch,Danielle C, AU - Beaulieu,Chandree, AU - Guion-Almeida,Maria Leine, AU - Zechi-Ceide,Roseli Maria, AU - Gener,Blanca, AU - Gillessen-Kaesbach,Gabriele, AU - Nava,Caroline, AU - Baujat,Geneviève, AU - Horn,Denise, AU - Kini,Usha, AU - Caliebe,Almuth, AU - Alanay,Yasemin, AU - Utine,Gulen Eda, AU - Lev,Dorit, AU - Kohlhase,Jürgen, AU - Grix,Arthur W, AU - Lohmann,Dietmar R, AU - Hehr,Ute, AU - Böhm,Detlef, AU - ,, AU - Majewski,Jacek, AU - Bulman,Dennis E, AU - Wieczorek,Dagmar, AU - Boycott,Kym M, Y1 - 2012/02/02/ PY - 2011/10/27/received PY - 2011/12/12/revised PY - 2011/12/30/accepted PY - 2012/2/7/entrez PY - 2012/2/7/pubmed PY - 2012/6/20/medline SP - 369 EP - 77 JF - American journal of human genetics JO - Am J Hum Genet VL - 90 IS - 2 N2 - Mandibulofacial dysostosis with microcephaly (MFDM) is a rare sporadic syndrome comprising craniofacial malformations, microcephaly, developmental delay, and a recognizable dysmorphic appearance. Major sequelae, including choanal atresia, sensorineural hearing loss, and cleft palate, each occur in a significant proportion of affected individuals. We present detailed clinical findings in 12 unrelated individuals with MFDM; these 12 individuals compose the largest reported cohort to date. To define the etiology of MFDM, we employed whole-exome sequencing of four unrelated affected individuals and identified heterozygous mutations or deletions of EFTUD2 in all four. Validation studies of eight additional individuals with MFDM demonstrated causative EFTUD2 mutations in all affected individuals tested. A range of EFTUD2-mutation types, including null alleles and frameshifts, is seen in MFDM, consistent with haploinsufficiency; segregation is de novo in all cases assessed to date. U5-116kD, the protein encoded by EFTUD2, is a highly conserved spliceosomal GTPase with a central regulatory role in catalytic splicing and post-splicing-complex disassembly. MFDM is the first multiple-malformation syndrome attributed to a defect of the major spliceosome. Our findings significantly extend the range of reported spliceosomal phenotypes in humans and pave the way for further investigation in related conditions such as Treacher Collins syndrome. SN - 1537-6605 UR - https://www.unboundmedicine.com/medline/citation/22305528/Haploinsufficiency_of_a_spliceosomal_GTPase_encoded_by_EFTUD2_causes_mandibulofacial_dysostosis_with_microcephaly_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0002-9297(12)00040-7 DB - PRIME DP - Unbound Medicine ER -