New: P077 BRCA2. This new probemix can be used to confirm results obtained with P045 BRCA2 probemix.

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1 SALSA MLPA KIT P045-B2 BRCA2/CHEK2 Lot 0410, As compared to version B1, four reference probes have been replaced and extra control fragments at 100 and 105 nt (X/Y specific) have been included. New: P077 BRCA2. This new probemix can be used to confirm results obtained with P045 BRCA2 probemix. BREAST CARCINOMA is the most common malignancy among women in developed countries and family history remains the strongest single predictor of breast cancer risk. Mutations in the BRCA1 and BRCA2 genes are linked to a high risk of young-onset breast cancer, and appear to be responsible for approximately 10% of total breast cancer cases. Women with these mutations have a cumulative risk of developing breast cancer (up to age 70) of 55-85%. The BRCA1 and BRCA2 proteins are associated with the activation of double-strand break repair and/or homologous recombination. Unlike BRCA1, BRCA2 has not been linked to ovarian cancer. BRCA2 mutations are less frequent than BRCA1 mutations but in families with male breast cancer cases, BRCA2 mutations may be more frequent. The P045-B2 probemix contains probes for all exons of the BRCA2 gene (13q12.3). Two probes are present for exons 1, 3 and 27, and for the large exon 11. For a reference, 8 probes for other human genes located on different chromosomes are included. In addition, two probes are present for sequences just before and after the BRCA2 gene. In addition, three probes for the CHEK2 gene on 22q12.1 are included. One of these probes will only result in an amplification product in case the DNA sample contains the CHEK2 1100delC mutation. The 1100delC allele appears to result in a two fold increase of breast cancer risk in woman and a 10-fold increase of risk in men. The 1100delC allele has been found in the Netherlands in 1.1% of healthy individuals and in 5.1% of individuals with breast cancer, including 13.5% of individuals from families with male breast cancer. This SALSA kit is designed to detect deletions/duplications of one or more sequences in the BRCA2 and CHEK2 genes in a DNA sample. Heterozygous deletions of recognition sequences should give a 35-50% reduced relative peak area of the amplification product of that probe. Note that a mutation or polymorphism in the sequence detected by a probe can also cause a reduction in relative peak area, even when not located exactly on the ligation site! In addition, some probe signals are more sensitive to sample purity and small changes in experimental conditions. Therefore, deletions and duplications detected by MLPA should always be confirmed by other methods. Not all deletions and duplications detected by MLPA will be pathogenic; users should always verify the latest scientific literature when interpreting their findings. Finally, note that most defects in this gene are expected to be small (point) mutations which will not be detected by this MLPA test. SALSA kits are sold by for research purposes and to demonstrate the possibilities of the MLPA technique. This kit is not CE/FDA certified for use in diagnostic procedures. SALSA MLPA kits are supplied with all necessary buffers and enzymes. Purchase of the SALSA MLPA test kits includes a limited license to use these products for research purposes. The use of this SALSA kit requires a thermocycler with heated lid and sequence type electrophoresis equipment. Different fluorescent PCR primers are available. The MLPA technique has been first described in Nucleic Acid Research 30, e57 (2002). Related SALSA MLPA kits P077 BRCA2: Results obtained with P045 or P090 can be confirmed with this kit. P090 BRCA2: Identical to P045 BRCA2/CHEK2, but does not contain probes for CHEK2. P002/P087 BRCA1: Hereditary breast cancer, screening BRCA1 P239 BRCA1 region: Characterization of BRCA1 deletions/duplications. P190 CHEK2: Breast cancer susceptibility, genes included: CHEK2, ATM, BRCA1&2, PTEN, TP53 P057 FANCD2/PALB2: Mutations in PALB2 have been linked to a higher risk on breast cancer. P240 BRIP1/CHEK1: Mutations in BRIP1 has been linked to a higher risk on breast cancer. P041/P042 ATM: Mutations in ATM has been linked to a higher risk on breast cancer. More information Website : info@mlpa.com (information & technical questions); order@mlpa.com (for orders) Mail : bv; Willem Schoutenstraat 6, 1057 DN Amsterdam, the Netherlands SALSA P045 BRCA2 Page 1 of 6

2 References of SALSA MLPA kit P045 Del Valle, J. et al. (2009) Identification and comprehensive characterization of large genomic rearrangements in the BRCA1 and BRCA2 genes. Breast Cancer Res. Treat. Epub. Hansen, T.O et al (2009) Large BRCA1 and BRCA2 genomic rearrangements in Danish high risk breastovarian cancer families. Breast Cancer Res. Treat. 115: Lim Y. et al. (2007). Identification of novel BRCA large genomic rearrangements in Singapore Asian breast and ovarian patients with cancer. Clin Genet Apr;71(4): Karhu R. et al. (2006). Large genomic BRCA2 rearrangements and male breast cancer. Cancer Detect Prev. 2006;30(6): Preisler S. et al. (2006). Gross rearrangements in BRCA1 but not BRCA2 play a notable role in predisposition to breast and ovarian cancer in high-risk families of German origin. Cancer Genet Cytogenet Jul 1;168(1):44-9. Thomassen M. et al. (2006). Low frequency of large genomic rearrangements of BRCA1 and BRCA2 in western Denmark. Cancer Genet Cytogenet Jul 15;168(2): Agata S et al (2005). Large genomic deletions inactivate the BRCA2 gene in breast cancer families. J Med Genet Oct;42(10):e64 Woodward AM, et al. (2005). Large genomic rearrangements of both BRCA2 and BRCA1 are a feature of the inherited breast/ovarian cancer phenotype in selected families. J Med Genet. 42(5):e31. Data analysis This P045-B2 BRCA2 probemix contains 44 different MLPA probes with amplification products between 130 and 494 nt. Please note that the 494 nt probe is specific for CHEK2 1100delC mutation and will only appear in samples containing this mutation. In addition, the P045-B2 BRCA2 probemix contains 9 control fragments generating an amplification product smaller than 120 nt: four DNA Quantity fragments (Q-fragments) at nt, three DNA denaturation control fragments (D-fragments) at nt, one X-fragment at 100 nt and one Y-fragment at 105 nt. More information on how to interpret observations on these control fragments can be found in the MLPA protocol. Data generated by this probemix can first be normalised intra-sample by dividing the peak area of each probe s amplification product by the total area of only the reference probes in this probemix (block normalisation). Secondly, inter-sample normalisation can be achieved by dividing the intra-normalised probe ratio in a sample by the average intra-normalised probe ratio of all reference samples. Please note that this type of normalisation assumes no changes occurred in the genomic regions recognised by the reference probes. Data normalisation should be performed within one experiment. Only samples purified by the same method should be compared. Confirmation of most exons deletions and amplifications can be done by e.g. Southern blotting, long range PCR, qpcr, FISH. Note that Coffalyser, the MLPA analysis tool developed at, can be downloaded free of charge from our website CHEK2del1100 probe We have received reports of experiments at three different laboratories in which the CHEK2del1100 peak spuriously appeared in known normal controls as well as all samples. At we have noticed this same phenomenon once with a similar CHEK2 probe in the P056 TP53 probemix. This did not seem to be a contamination problem, as it appeared in some experiments but not in others in which the same vials of probemix and reagents were used. Despite many attempts with variations in the protocol, we have not been able to reproduce this. Results obtained with this CHEK2 mutation probe should therefore be treated with caution. Please note that the presence of this allele increases the risk on breast cancer in woman only twofold. This probemix was developed by at. Info/remarks/suggestions for improvement: info@mlpa.com. SALSA P045 BRCA2 Page 2 of 6

3 Table 1. SALSA MLPA P045-B2 BRCA2 probemix Length (nt) SALSA MLPA probe Chromosomal position reference CHEK2 BRCA Q-fragments: DNA quantity; only visible with less than 100 ng sample DNA D-fragments: Low signal of 88 or 96 nt fragment indicates incomplete denaturation 100 X-fragment: Specific for the X chromosome 105 Y-fragment: Specific for the Y chromosome 130 Reference probe L q BRCA2 probe L12281 Exon BRCA2 probe L01776 Exon BRCA2 probe L08066 Exon FRY probe L kb before BRCA2 166 BRCA2 probe L01985 Exon BRCA2 probe L09587 Exon BRCA2 probe L10642 Exon Reference probe L q BRCA2 probe L10643 Exon BRCA2 probe L04671 Exon BRCA2 probe L08128 Exon * Reference probe L q BRCA2 probe L01184 Exon BRCA2 probe L01185 Exon Reference probe L q BRCA2 probe L01186 Exon BRCA2 probe L01770 Exon 11 start 265 HCS20 probe L02040 In CHEK2 promotor region 274 BRCA2 probe L01188 Exon 11 end 283 BRCA2 probe L01189 Exon Reference probe L q BRCA2 probe L01771 Exon ± BRCA2 probe L10257 Exon ± BRCA2 probe L11090 Exon BRCA2 probe L01192 Exon BRCA2 probe L01193 Exon BRCA2 probe L03983 Exon BRCA2 probe L01772 Exon ~ BRCA2 probe L01195 Exon Reference probe L q BRCA2 probe L01196 Exon BRCA2 probe L08129 Exon CHEK2 probe L12282 CHEK2 Exon BRCA2 probe L01970 Exon BRCA2 probe L01199 Exon * Reference probe L q BRCA2 probe L08130 Exon BRCA2 probe L08131 Exon N4BP2L1 (CG018) probe L kb after BRCA2 463 BRCA2 probe L15346 Exon ± BRCA2 probe L15678 Exon * Reference probe L q CHEK2 probe L15680 CHEK2 exon 11, Mutation 1100delC specific! * New in version B2 (from lot 0609 onwards). Changed in version B2 (from lot 0609 onwards). Small change in length, not in sequence detected. The 172 nt exon 3 probe is influenced by the 504del 5068insCCAT mutation, the 178 nt probe is not. The benign BRCA2 polymorphism 2192C>G (P655R) may reduce the signal of the 256 nt exon 11 probe (false positive signal). ± The two exon 27 probes have a higher standard variation than average. Apparent deletions of only one exon 27 probe could be a false positive. Mutation 1100delC-specific! This peak will only appear if the point mutation is present. More on page 2. ~ We have been informed by lab in Oslo of a sequence variation in the region targeted by this probe (01613-L01195). The variant BRCA2 c.8229_8243del15 results in frame deletion of 5 AA (p.arg2744_gly2748del). The pathogenicity of this variant is not yet clear. In case of apparent deletions, it is recommended to sequence the region targeted by this probe. SALSA P045 BRCA2 Page 3 of 6

4 Table 2. BRCA2 probes arranged according to chromosomal location Length (nt) SALSA MLPA probe BRCA2 exon Ligation site NM_ Partial sequence (20 nt adjacent to ligation site) Distance to next probe L09586 FRY gene CCCAGAGTTA-CCGAGTCCTC 20.1 kb Start codon (exon 2) L12281 Exon 1 Promoter region GCGCGGGCTT-GTGGCGCGAG 0.2 kb L01776 Exon 1 Promoter region GTAGTGGGTT-GGGACGAGCG 0.8 kb L01985 Exon reverse CGTGTCTTAA-AAATTTCAAA 2.8 kb L10642 Exon TAATATTCAA-AGAGCAAGGG 0.2 kb L09587 Exon nt after exon 3 GGGCAAATCA-GTCTCTCTGG 5.7 kb L04671 Exon TAGTAGACAT-AAAAGTCTTC 1.0 kb L10257 Exon TAACACCACA-AAGAGATAAG 0.1 kb L03983 Exon reverse AAACTTTGGT-GTATGAAACA 0.3 kb L08128 Exon GTCTTGGTCA-AGTTCTTTAG 2.6 kb L01184 Exon nt before exon 8 TGACTTTCCA-ACTCATTGTG 1.8 kb L01185 Exon CACAAATCAA-AGAGAAGCTG 1.6 kb L01186 Exon AGTGACAAAA-TCTCCAAGGA 3.7 kb L01770 Exon TGAAGAACCA-ACTTTGTCCT 4.8 kb L01188 Exon TCTTTTTACA-TGTCCCGAAA 3.3 kb L01189 Exon nt before exon 12 ACAGAACAAA-AATGTAATTG 2.5 kb L01771 Exon reverse ACACAGGTAA-TCGGCTCTAA 8.2 kb L08066 Exon TGCTACAAGA-AATGAAAAAA 1.5 kb L01192 Exon GTCTGTATCT-TGCAAAAACA 1.3 kb L01193 Exon AGTTGGCTGA-TGGTGGATGG 4.8 kb L01772 Exon reverse AGGCATCTAT-TAGCAAATTC 0.8 kb 364~ L01195 Exon AGAAGATTAT-TCTTCATGGAG 7.0 kb L01196 Exon ATACCAAACT-TGGATTCTTT 0.5 kb L08129 Exon CTGGATTATA-CATATTTCGC 5.7 kb L01970 Exon AAGACAGCAA-GTTCGTGCTT 2.7 kb L01199 Exon CTGAACAAAA-GGAACAAGGT 0.3 kb L10643 Exon CATCAGATTT-ATATTCTCTG 0.3 kb L08130 Exon reverse AACGACAAAT-CCTATTAGGT 14.8 kb L08131 Exon AGACATTCAA-CAAAATGAAA 2.0 kb L15346 Exon CTGCATGCAA-ATGATCCCAA 1.3 kb 476 ± L15678 Exon AGTCTTGTAA-AGGGGAGAAA 0.6 kb 319 ± L11090 Exon CGGGCAAAAA-TCGTTTTGCC 8.4 kb Stop codon N4BP2L L01619 TTATTATTGA-TAATACCAAC (CG018) gene The 172 nt exon 3 probe will give a 50% reduced probe signal when the exon 3, 504del 5068insCCAT mutation is present ( The 178 nt exon 3 probe is not influenced by this deletion which has a breakpoint within BRCA2 exon 3. The benign BRCA2 polymorphism 2192C>G (P655R) may reduce the signal of the 256 nt exon 11 probe (false positive signal). ± The two exon 27 probes have a higher standard variation than average. Apparent deletion of only one exon 27 probe could be a false positive. A copy number change of the more variable exon 5 probe is unlikely in case the exon 6 probe, which is at very close distance, has no copy number change. ~ We have been informed by lab in Oslo of a sequence variation in the region targeted by this probe ( L01195). The variant BRCA2 c.8229_8243del15 results in frame deletion of 5 AA (p.arg2744_gly2748del). The pathogenicity of this variant is not yet clear. In case of apparent deletions, it is recommended to sequence the region targeted by this probe. Note: Exon numbering used here may differ from literature! Complete probe sequences are available on request: info@mlpa.com. Please notify us of any mistakes: info@mlpa.com. SALSA P045 BRCA2 Page 4 of 6

5 SALSA MLPA kit P045-B2 BRCA2 sample pictures 127,97 211, ,45 134,44 165,10 273,68 219, ,93 159,52 176,18 202,41 196,70 228,97 301,65 325,51 344, ,34 95,60 105,26 90,87 151,43 190,53 170,94 237,21 265,23 247,59 256,27 354,41 408,97 426,96 291,32 336,95 317,19 382,87 417,84 309,46 363,66 390,03 373,27 464,08 282,20 444,48 436, ,27 455,37 486,80 100, , Dye Signal Size (nt) Figure 1. Capillary electrophoresis pattern from a sample of approximately 50 ng human male control DNA analyzed with SALSA MLPA kit P045-B2 BRCA2 (lot 0410) ,51 135,02 128,13 165,23 182,54 211, ,74 96,16 159,67 146,19 176,23 151,60 220,02 202,42 196,82 229,05 237,34 273,76 265,31 301,72 325,66 344,91 409, ,69 91,20 247,69 256,35 354, ,61 317,60 337,07 291,49 309,59 363,78 390,15 382,89 418,07 427, ,01 282,27 373,36 400,37 463,94 444,67 436,04 455,24 495,04 486, , Dye Signal Size (nt) Figure 2. Capillary electrophoresis pattern from a sample of a CHEK2 exon delC mutation carrying patient (approximately 50 ng) analyzed with SALSA MLPA kit P045-B2 BRCA2 (lot 0410). Arrow indicates the probe specific for the 1100delC mutation. SALSA P045 BRCA2 Page 5 of 6

6 Implemented Changes compared to the previous product description version(s). Version 17 (46) - Warning added for a sequence variant under table 1 and 2 for probe (01613-L01195) at 364 nt. - Tables have been numbered. - Small layout changes under table 1 on page 3. Version 16 (46) - Product description adapted to a new product version (version number changed, lot number added, small changes in Table 1 and Table 2, new pictures included). - Small changes of probe lengths in Table 1 and 2 in order to better reflect the true lengths of the amplification products. SALSA P045 BRCA2 Page 6 of 6

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