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Human vs Domestic yak LastZ results

Human (Homo sapiens, GRCh38) and Domestic yak (Bos grunniens, LU_Bosgru_v3.0) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 99. 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

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

Statistics over 2,396,947 alignment blocks

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

Uncovered: 1,699,345,918 out of 3,099,750,718
Covered: 1,400,404,800 out of 3,099,750,718

Uncovered: 2,223,034 out of 38,571,754
Matches: 30,873,243 out of 38,571,754
Mismatches: 4,990,526 out of 38,571,754
Insertions: 484,951 out of 38,571,754
Identity over aligned base-pairs: 84.9%

Domestic yak

Uncovered: 1,520,259,915 out of 2,832,776,395
Covered: 1,312,516,480 out of 2,832,776,395

Uncovered: 4,504,974 out of 34,628,786
Matches: 26,175,168 out of 34,628,786
Mismatches: 3,763,788 out of 34,628,786
Insertions: 184,856 out of 34,628,786
Identity over aligned base-pairs: 86.9%

Block size distribution

Size range All 2,396,947 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
77,705
519.0 kb
10 bp - 100 bp
290,641
14.5 Mb
17,822
1.2 Mb
100 bp - 1 kb
1,562,688
692.8 Mb
61,165
22.0 Mb
1 kb - 10 kb
465,694
797.7 Mb
18,542
45.4 Mb
10 kb - 100 kb
214
3.2 Mb
1,714
43.0 Mb
100 kb - 1 Mb
5
569.7 kb
225
63.8 Mb
1 Mb - 10 Mb
114
462.4 Mb
10 Mb - 100 Mb
43
871.6 Mb