Human vs Dolphin LastZ results

Human (Homo sapiens, GRCh38) and Dolphin (Tursiops truncatus, turTru1) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 76. 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

ParameterHumanDolphin
Chunk size30,000,00010,100,000
Overlap0100,000
Group set size10,100,000
Masking options{default_soft_masking => 1}

Statistics over 1,873,790 alignment blocks

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

Uncovered: 1,667,572,021 out of 3,099,750,718
Covered: 1,432,178,697 out of 3,099,750,718

Uncovered: 3,542,944 out of 38,571,754
Matches: 30,041,845 out of 38,571,754
Mismatches: 4,557,450 out of 38,571,754
Insertions: 429,515 out of 38,571,754
Identity over aligned base-pairs: 85.8%

Dolphin

Uncovered: 1,176,331,833 out of 2,521,923,936
Covered: 1,345,592,103 out of 2,521,923,936

Uncovered: 1,618,758 out of 28,474,706
Matches: 23,926,505 out of 28,474,706
Mismatches: 2,870,200 out of 28,474,706
Insertions: 59,243 out of 28,474,706
Identity over aligned base-pairs: 89.1%

Block size distribution

Size range All 1,873,790 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
29,182
188.1 kb
10 bp - 100 bp
163,761
9.6 Mb
21,318
1.5 Mb
100 bp - 1 kb
1,170,219
529.8 Mb
78,995
29.5 Mb
1 kb - 10 kb
510,356
956.9 Mb
26,002
68.1 Mb
10 kb - 100 kb
272
3.2 Mb
10,015
385.2 Mb
100 kb - 1 Mb
4,298
997.1 Mb
1 Mb - 10 Mb
15
18.4 Mb