class: center, middle, inverse, title-slide # .huge[The ‘omic coal face:] ##
classifying human genomic and epigenomic inheritance
###
Dr Miles Benton
Genomics Research Centre, Institute of Health and Biomedical Innovation
### IHBI Inspires: 23
rd
- 25
th
August 2017 --- class: middle # .center[My presentation available online] <br /> <p> .center[ <!--  --> <img src="images/github_logo.png" style="width: 520px; margin-right: 1%; margin-top: 1.5em;"/> <img src="images/ihbi_qr_code.jpg" style="width: 202px; margin-right: 1%; margin-top: 1.5em;"/> ] </p> <br /> .center[[sirselim.github.io/presentations](http://sirselim.github.io/presentations)] --- class: inverse middle # NORFOLK ISLAND .large[...a little story time...] --- class: inverse middle center <p> .center[<img src="images/NorfolkIsland.png" style="width: 60%; margin-right: 1%; margin-top: 1.5em; border: 3px solid white;"/>] </p> --- class: middle center
--- class: inverse middle center <p> .center[<img src="images/NIpedigree.png" style="width: 70%; margin-right: 1%; margin-top: 1.5em; border: 3px solid white;"/>] </p> <p style="font-size: 14px">Macgregor S <i>et al.,:</i> <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2987173/" target="blank"><i>Legacy of mutiny on the Bounty: founder effect and admixture on Norfolk Island.</i></a> Eur J Hum Genet. 2010; 18: 67–72.</p> --- class: inverse middle center <p> .center[<img src="images/NI_ped_mt.png" style="width: 95%; margin-right: 1%; margin-top: 1.5em; border: 3px solid white;"/>] </p> 40% of current population haplogroup <span style="color:lightblue">B4a1a[...]</span><br /> <p style="font-size: 14px">Benton MC <i>et al.,:</i> <a href="https://investigativegenetics.biomedcentral.com/articles/10.1186/s13323-015-0028-9" target="blank"><i>“Mutiny on the Bounty”: the genetic history of Norfolk Island reveals extreme gender-biased admixture.</i></a> Investigative Genetics 2015, 6:11.</p> --- class: middle inverse # Founder Effect Variants <p style="font-size: 20px"> Other contributors: <span style="color:lightblue">Rod Lea, David Eccles, Donia Macartney-Coxson, Heidi Sutherland, Larisa Haupt, Lyn Griffiths</span> </p> --- ## Whole Genome Sequencing .medium[ <span style="color:darkblue">**N=108**</span> core pedigree individuals sequenced Platform – **Illumina HiSeq-X10 (Garvan)** Bioinformatics: - BOWTIE2 –> SAMTOOLS -> VCF annotation –> dbSNP -> dbNSFP -> VEP -> custom beds Coverage >25X ] -- ## Functional Founder Effect Variants .medium[ <span style="color:darkblue">**Functional**</span> = Predicted damaging in *in silico* tests: - SIFT, POLYPHEN2, MUTATIONTASTER, PROVEAN, MUTATION ASSESSOR, CADD <span style="color:darkblue">**Founder effect**</span> = increased allele freq in NI compared to general population - (MAF<0.01% in 1000G >5% in NI) <span style="color:darkblue">**Variant**</span> = single nucleotide variant (SNV) ] ---
--- class: middle # *ACOT4* (Acyl-CoA Thioesterase 4) - <span style="color:darkblue">**regulation of lipid metabolism**</span> - SNV = rs77408762 (T/A) - Chr14, pos 73593812 (Hg38) - Amino acid = p.TYR190ASN - freq A = 0.0099 (EUR), 0 (AFR) and 0 (EAS) - freq A in NI = 0.26 <br /> .center[**Rare allele most likely came from England via Bounty Mutineers and then increased in frequency in NI due to founder effect**] --- class: middle center <img src="images/WGS_boxplots.png" style="width: 95%; margin-right: 1%; margin-top: 1.5em; border: 3px solid white;"/> --- class: middle .center[## *de novo* SNVs] ### 3 variants meeting the 'damaging' criteria, >5% MAF in NI, all missense - *JPH2* (<span style="color:darkblue">Junctophilin 2</span>) + chr20:44186654; c.52T>G; p.Trp18Gly; [48 hets, **MAF=0.22**] + mutations previously linked to inherited cardiomyopathy (Landstrom *et al*, 2007) <br /> - *EPS15L1* (<span style="color:darkblue">Epidermal growth factor receptor substrate 15-like 1</span>) + Chr19:16425252; c.623T>C; p.Leu208Pro; [35 hets, **MAF=0.16**] <br /> - *UGT2B4* (<span style="color:darkblue">UDP glucuronosyltransferase 2 family, polypeptide B4</span>) + chr4:69480794; c.1427T>A; p.Leu476His; [12 hets, **MAF=0.06**] --- class: middle # Summary <br > .large[ - Using WGS and founder effect in NI may reveal disease-related variants that are rare in general populations <br > - Focusing on “functional” SNVs has identified strong candidate variants + performing genotyping in the rest of the pedigree <br > - Some early evidence of association with T2D and CVD-related traits ] --- class: middle inverse # Allele-Specific Methylation <p style="font-size: 20px"> Other contributors: <span style="color:lightblue">Rod Lea, Donia Macartney-Coxson, Nicole White, Daniel Kennedy, Heidi Sutherland, Larisa Haupt, Kerrie Mengersen, Lyn Griffiths</span> </p> --- class: middle center # Methylation - the punctuation of the genome <img src="https://dryuc24b85zbr.cloudfront.net/tes/resources/11186761/image?width=500&height=500&version=1451670447659" style="width: 30%; margin-right: 1%; margin-top: 1.5em; border: 3px solid white;"/> --- class: middle inverse .large[<b>Allele-specific methylation (ASM):</b> - same cytosine is differentially methylated on the <span style="color:lightblue"><b>two alleles</b></span> of a diploid organism] .large[ASM is a major mechanism of <span style="color:lightblue"><b>genomic imprinting</b></span> (aberrations can lead to disease)] .center[ <img src="http://rstb.royalsocietypublishing.org/content/royptb/368/1609/20120151/F2.large.jpg?width=800&height=600&carousel=1" style="width: 45%; margin-right: 1%; margin-top: 1.5em; border: 3px solid white;"/> <p style="font-size: 12px">image rights: Renfree MB <i>et al.,:</i> <a href="http://rstb.royalsocietypublishing.org/content/368/1609/20120151" target="blank"><i>“The origin and evolution of genomic imprinting and viviparity in mammals.</i></a> 2012</p> ] --- ### Identification of allele-specific methylation profiles across generations measuring genome-wide allele-specific methylation (ASM) - NGS bisulphite sequencing - SeqCap Epi CpGiant (Illumina HiSeq) collected data for <span style="color:darkblue"><b>108</b></span> NI individuals</li> - comprising a close 3 generation pedigree <br /> -- fully customised QC and analysis pipeline:<span style="color:darkblue"><b>*</b></span> - fastqc, trimgalore - bismark, sambamba, picard tools - methpipe (ASM estimation) - MethylDackel (originally PileOMeth), R and methylkit - Shiny webserver visualisation parallel processing enabled for local and remote machines .center[ <span style="color:darkblue; font-size: 75%"><b>*<i>once wrangled into shape scripts will be accessible via GitHub</i></b></span> ] --- class: center middle ## Chromosome 15 <img src="images/ASM_chr15_SNP_MAF_update.png" style="width: 95%; margin-right: 1%; margin-top: 1.5em; border: 3px solid white;"/> .small[**15q11-q13**: Angelman syndrome (maternally active allele) | Prader-Willi syndrome (paternally active allele)] --- class: center middle ## Chromosome 21 <img src="images/ASM_chr21_SNP_MAF_update.png" style="width: 95%; margin-right: 1%; margin-top: 1.5em; border: 3px solid white;"/> .small[***WRB*** is found to be maternally imprinted] --- class: inverse # Allele-specific Methylated Regions (AMRs) #### Overlap with known imprinting genes - there are <span style="color:lightblue"><b>91</b></span> known imprinted genes with strong evidence - we have identified <span style="color:lightblue"><b>12761</b></span> total AMR (>=2 CpG sites) - we recoup 72/91 (<span style="color:lightblue"><b>79%</b></span>) of the above known genes -- #### Small AMRs (>=2 CpG sites and <= 200bp length) - there are <span style="color:lightblue"><b>4731 small AMR</b></span> which collectively span 6987 genomic features - <span style="color:lightblue"><b>35.8%</b></span> promoter related -- #### Large AMRs (>=200 CpG sites) - <span style="color:lightblue"><b>11 large AMR</b></span> (spanning some really interesting regions, i.e. *PCDH*, *HOX*) -- #### Genetic variation across AMR - <span style="color:lightblue"><b>2,388</b></span> AMR have no common SNPs (very little genetic variation) --- class: middle center
--- class: middle inverse # Inheritance of Allele-Specfic Methylation? --- class: middle center <img id="movie" src="images/scatter_movie.gif" width=45% /> <p style="text-align: center; font-size: 18px;"> <b>ASM plot of chromosome 20 for a nuclear family</b> (<span style="color:darkred"><b>father</b></span>, <span style="color:pink"><b>mother</b></span>, <span style="color:lightblue"><b>son</b></span>, <span style="color:green"><b>daughter</b></span>) </p> --- class: middle center <img src="images/NI_ASM_chr10_genetic_161128.png" style="width: 95%; margin-right: 1%; margin-top: 1.5em; border: 3px solid white;"/> --- class: middle center <img src="images/NI_ASM_chr17_example_161128.png" style="width: 49%; margin-right: 1%; margin-top: 1.5em; border: 3px solid white;"/> --- class: middle inverse # Summary .large[ - implemented a custom bioinformatic pipeline ] <br /> .large[ - generated a genome-wide 'map' of AMRs + allows exploration of the genomic landscape and features ] <br /> .large[ - identified **ASM hotspots** overlapping non-coding RNA and other important functional loci + **might account for the number of GWAS hits outside of genes?** ] --- class: inverse ## Acknowledgments .pull-left[.medium[ #### <span style="color:lightblue">QUT</span> Lyn Griffiths Rod Lea Larisa Haupt Heidi Sutherland Michelle Hanna ...the rest of the GRC IHBI lab group Nicole White Daniel Kennedy Kerrie Mengersen <span style="color:lightblue">**WGS sequencing:**</span> Garvan Institute of Medical Research / Kinghorn Centre for Clinical Genomics <span style="color:lightblue">**Funding:**</span> NHMRC, QUT Strategic Funds ]] .pull-right[.medium[ #### <span style="color:lightblue">STDOI @ UTRGV</span> John Blangero Joanne Curran Harald Goring Greg Gibson (Georgia Institute of Technology, USA) Melanie Carless (Texas Biomedical Research Institute) Claire Bellis (Genome Institute of Singapore) #### <span style="color:lightblue">NZ collaborators</span> Donia Macartney-Coxson (ESR) David Eccles (Gringene Bioinformatics) Geoff Chambers (VUW) ]] <br /> .large[.center[<b>The people of Norfolk Island who who volunteered for this study.</b>]] --- class: middle center inverse background-image: url(images/IMG_1127.JPG) background-size: cover .large[# Thanks, any questions?] <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />