The Sequence of the Human Genome
Sequence assembly
Hybrid genome assembly
DOI:
10.1126/science.1058040
Publication Date:
2002-07-27T05:48:21Z
AUTHORS (274)
ABSTRACT
A 2.91-billion base pair (bp) consensus sequence of the euchromatic portion human genome was generated by whole-genome shotgun sequencing method. The 14.8-billion bp DNA over 9 months from 27,271,853 high-quality reads (5.11-fold coverage genome) both ends plasmid clones made five individuals. Two assembly strategies—a and a regional chromosome assembly—were used, each combining data Celera publicly funded effort. public were shredded into 550-bp segments to create 2.9-fold those regions that had been sequenced, without including biases inherent in cloning procedure used group. This brought effective assemblies eightfold, reducing number size gaps final what would be obtained with 5.11-fold coverage. two strategies yielded very similar results largely agree independent mapping data. effectively cover chromosomes. More than 90% is scaffold 100,000 or more, 25% scaffolds 10 million larger. Analysis revealed 26,588 protein-encoding transcripts for which there strong corroborating evidence an additional ∼12,000 computationally derived genes mouse matches other weak supporting evidence. Although gene-dense clusters are obvious, almost half dispersed low G+C separated large tracts apparently noncoding sequence. Only 1.1% spanned exons, whereas 24% introns, 75% being intergenic DNA. Duplications segmental blocks, ranging up chromosomal lengths, abundant throughout reveal complex evolutionary history. Comparative genomic analysis indicates vertebrate expansions associated neuronal function, tissue-specific developmental regulation, hemostasis immune systems. comparisons between provided locations 2.1 single-nucleotide polymorphisms (SNPs). random haploid genomes differed at rate 1 per 1250 on average, but marked heterogeneity level polymorphism across genome. Less 1% all SNPs resulted variation proteins, task determining have functional consequences remains open challenge.
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