Complex genetic variation in nearly complete human genomes
Abstract
Diverse sets of complete human genomes are required to construct a pangenome reference and to understand the extent of complex structural variation. Here, we sequence 65 diverse human genomes and build 130 haplotype-resolved assemblies (130 Mbp median continuity), closing 92% of all previous assembly gaps1,2 and reaching telomere-to-telomere (T2T) status for 39% of the chromosomes. We highlight complete sequence continuity of complex loci, including the major histocompatibility complex (MHC), SMN1/SMN2, NBPF8, and AMY1/AMY2, and fully resolve 1,852 complex structural variants (SVs). In addition, we completely assemble and validate 1,246 human centromeres. We find up to 30-fold variation in α-satellite high-order repeat (HOR) array length and characterize the pattern of mobile element insertions into α-satellite HOR arrays. While most centromeres predict a single site of kinetochore attachment, epigenetic analysis suggests the presence of two hypomethylated regions for 7% of centromeres. Combining our data with the draft pangenome reference1 significantly enhances genotyping accuracy from short-read data, enabling whole-genome inference3 to a median quality value (QV) of 45. Using this approach, 26,115 SVs per sample are detected, substantially increasing the number of SVs now amenable to downstream disease association studies.
Competing Interest Statement
E.E.E. is a scientific advisory board member of Variant Bio, Inc. C. Lee is a scientific advisory board member of Nabsys and Genome Insight. S.K. has received travel funds to speak at events hosted by Oxford Nanopore Technologies. The following authors have previously disclosed a patent application (No. EP19169090) relevant to Strand-seq: J.O.K., T.M., and D.P. The other authors declare no competing interests.
Subject Area
- Biochemistry (13411)
- Bioengineering (10209)
- Bioinformatics (32648)
- Biophysics (16812)
- Cancer Biology (13880)
- Cell Biology (19716)
- Clinical Trials (138)
- Developmental Biology (10660)
- Ecology (15773)
- Epidemiology (2067)
- Evolutionary Biology (20084)
- Genetics (13258)
- Genomics (18403)
- Immunology (13502)
- Microbiology (31621)
- Molecular Biology (13177)
- Neuroscience (68884)
- Paleontology (512)
- Pathology (2137)
- Pharmacology and Toxicology (3686)
- Physiology (5750)
- Plant Biology (11829)
- Synthetic Biology (3316)
- Systems Biology (8053)
- Zoology (1821)