Using non-overlapping fragments for nucleic acid sequencing
First Claim
1. A method of determining nucleotide sequences of one or more target polynucleotides of an organism without cell-based cloning, the method comprising the steps of:
- providing a plurality of aliquots, most of which contain a mixture of fragments of the target polynucleotide(s), wherein any given segment of the target polynucleotide(s) that is 100 to 300 nucleotides in length is represented by a single non-overlapping fragment in 60% or more of the aliquots containing such segment;
obtaining sequence reads for fragments from the plurality of aliquots;
determining the aliquot of origin of a plurality of fragments from which sequence reads have been obtained; and
assembling the sequence reads to produce an assembled sequence.
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Abstract
The invention provides methods and kits for ordering sequence information derived from one or more target polynucleotides. In one aspect, one or more tiers or levels of fragmentation and aliquoting are generated, after which sequence information is obtained from fragments in a final level or tier. Each fragment in such final tier is from a particular aliquot, which, in turn, is from a particular aliquot of a prior tier, and so on. For every fragment of an aliquot in the final tier, the aliquots from which it was derived at every prior tier is known, or can be discerned. Thus, identical sequences from overlapping fragments from different aliquots can be distinguished and grouped as being derived from the same or different fragments from prior tiers. When the fragments in the final tier are sequenced, overlapping sequence regions of fragments in different aliquots are used to register the fragments so that non-overlapping regions are ordered. In one aspect, this process is carried out in a hierarchical fashion until the one or more target polynucleotides are characterized, e.g. by their nucleic acid sequences, or by an ordering of sequence segments, or by an ordering of single nucleotide polymorphisms (SNPs), or the like.
181 Citations
20 Claims
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1. A method of determining nucleotide sequences of one or more target polynucleotides of an organism without cell-based cloning, the method comprising the steps of:
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providing a plurality of aliquots, most of which contain a mixture of fragments of the target polynucleotide(s), wherein any given segment of the target polynucleotide(s) that is 100 to 300 nucleotides in length is represented by a single non-overlapping fragment in 60% or more of the aliquots containing such segment; obtaining sequence reads for fragments from the plurality of aliquots; determining the aliquot of origin of a plurality of fragments from which sequence reads have been obtained; and assembling the sequence reads to produce an assembled sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification