PMC

A novel heterozygous mutation c.1639-1652del14 is present in the mother, patient, and his sister. A novel heterozygous splice donor site mutation c.1335+2T>A is present in the father, patient, and his sister. Compound heterozygous SLC34A3 mutations are carried by both patient and his sister. Mutation is indicated by an arrow.

(A) Five novel PHEX mutations. c.983_987dupCTACC (patient II-3 and her mother) and c.436+1G>T (patient IX-3 and his mother) are inherited mutations from mother; c.1586+2T>G (patinet IV-3), c.1206delA (patient XV-3), and c.1217G>T (patientVI-3) are de novo mutations not present in parents. The c.1586+2T>G results in exon 14 skipping. (B) Six previously reported PHEX mutations. c.1645C>T, c. 187+1G>T, and c.2104C>T are de novo mutations. c.1601C>T, c.2239C>T, and c.1404+1del G are inherited mutations transmitted from mother. Mutation is indicated by an arrow.

(A) Genechip cytogenetics array results. The top is showing weighted log2 ratios plot showing a normal copy number state for the X chromosome. The deletion is indicated by a dark bar and enclosed in the black lines. More than 70 SNP probes are present in the deleted region and indicated by an arrow. (B) Schematic representation of 179,880 bp deletion of PHEX and ZNF645. The 5’ breakpoint is located in the intron 15 of PHEX and 7 kb from exon 15. The 3’ breakpoint point is 103 kb from ZNF645, resulting in the deletion of exon 16–22 of PHEX and entire ZNF645. The 5’ and 3’ undeleted nucleotide sequences are highlightted in bold. Deletion analysis is based on GRCh37/hg19. (C) Electropherogram of the breaking point. The DNA fragment was amplified by PCR using primers flanking the 5’ and 3’ deletion point. The breakpoint is indicated by an arrow.