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Human vs Kangaroo rat LastZ results

Human (Homo sapiens, GRCh38) and Kangaroo rat (Dipodomys ordii, Dord_2.0) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 90. Human was used as the reference species. After running LastZ, the raw LastZ alignment blocks were chained according to their location in both genomes. During the final netting process, the best sub-chain was chosen in each region on the reference species.

Configuration parameters

ParameterValue
Gap open penalty (O)400
Gap extend penalty (E)30
HSP threshold (K)3000
Threshold for gapped extension (L)3000
Threshold for alignments between gapped alignment blocks (H)2200
Seed and Transition value (T)1
Scoring matrix (Q)
Default:
     A    C    G    T
    91 -114  -31 -123
  -114  100 -125  -31
   -31 -125  100 -114
  -123  -31 -114   91

Chunking parameters

ParameterHumanKangaroo rat
Chunk size10,000,00010,100,000
Overlap0100,000
Group set size10,100,000
Masking options{default_soft_masking => 1}{default_soft_masking => 1}

Statistics over 1,718,120 alignment blocks

Genome coverage (bp) Coding exon coverage (bp)
Human

Uncovered: 2,053,217,004 out of 3,099,750,718
Covered: 1,046,533,714 out of 3,099,750,718

Uncovered: 3,210,570 out of 38,571,754
Matches: 29,419,939 out of 38,571,754
Mismatches: 5,359,755 out of 38,571,754
Insertions: 581,490 out of 38,571,754
Identity over aligned base-pairs: 83.2%

Kangaroo rat

Uncovered: 1,277,514,672 out of 2,236,368,823
Covered: 958,854,151 out of 2,236,368,823

Uncovered: 681,063 out of 26,238,403
Matches: 22,152,684 out of 26,238,403
Mismatches: 3,297,434 out of 26,238,403
Insertions: 107,222 out of 26,238,403
Identity over aligned base-pairs: 86.7%

Block size distribution

Size range All 1,718,120 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
36,717
248.8 kb
10 bp - 100 bp
196,203
10.2 Mb
12,621
875.0 kb
100 bp - 1 kb
1,143,206
512.4 Mb
52,469
20.3 Mb
1 kb - 10 kb
341,824
579.7 Mb
20,282
45.6 Mb
10 kb - 100 kb
170
2.2 Mb
918
21.3 Mb
100 kb - 1 Mb
197
79.0 Mb
1 Mb - 10 Mb
199
690.5 Mb
10 Mb - 100 Mb
17
247.1 Mb