Title

Frameshift mutation in p53 regulator RPL26 is associated with multiple physical abnormalities and a specific pre-ribosomal RNA processing defect in diamond-blackfan anemia

UMMS Affiliation

Department of Pediatrics

Date

7-2012

Document Type

Article

Medical Subject Headings

Anemia, Diamond-Blackfan; Ribosomal Proteins; Frameshift Mutation

Disciplines

Hematology | Hemic and Lymphatic Diseases | Pediatrics

Abstract

Diamond-Blackfan anemia (DBA) is an inherited form of pure red cell aplasia that usually presents in infancy or early childhood and is associated with congenital malformations in approximately 30-50% of patients. DBA has been associated with mutations in nine ribosomal protein (RP) genes in about 53% of patients. We completed a large-scale screen of 79 RP genes by sequencing 16 RP genes (RPL3, RPL7, RPL8, RPL10, RPL14, RPL17, RPL19, RPL23A, RPL26, RPL27, RPL35, RPL36A, RPL39, RPS4X, RPS4Y1, and RPS21) in 96 DBA probands. We identified a de novo two-nucleotide deletion in RPL26 in one proband associated with multiple severe physical abnormalities. This mutation gives rise to a remarkable ribosome biogenesis defect that affects maturation of both the small and the large subunits. We also found a deletion in RPL19 and missense mutations in RPL3 and RPL23A, which may be variants of unknown significance. Together with RPL5, RPL11, and RPS7, RPL26 is the fourth RP regulating p53 activity that is linked to DBA.

Rights and Permissions

Citation: Hum Mutat. 2012 Jul;33(7):1037-44. doi: 10.1002/humu.22081. Epub 2012 Apr 16. Link to article on publisher's site

Related Resources

Link to Article in PubMed