Human vs Horse LastZ results

Human (Homo sapiens, GRCh38) and Horse (Equus caballus, EquCab3.0) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 95. 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

ParameterHumanHorse
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 2,060,388 alignment blocks

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

Uncovered: 1,379,422,051 out of 3,099,750,718
Covered: 1,720,328,667 out of 3,099,750,718

Uncovered: 1,431,376 out of 38,571,754
Matches: 32,438,723 out of 38,571,754
Mismatches: 4,347,778 out of 38,571,754
Insertions: 353,877 out of 38,571,754
Identity over aligned base-pairs: 87.3%

Horse

Uncovered: 882,767,682 out of 2,506,966,135
Covered: 1,624,198,453 out of 2,506,966,135

Uncovered: 3,489,313 out of 38,317,516
Matches: 30,612,214 out of 38,317,516
Mismatches: 3,928,155 out of 38,317,516
Insertions: 287,834 out of 38,317,516
Identity over aligned base-pairs: 87.9%

Block size distribution

Size range All 2,060,388 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
84,718
570.9 kb
10 bp - 100 bp
270,130
12.3 Mb
19,840
1.3 Mb
100 bp - 1 kb
1,090,068
498.2 Mb
58,758
20.7 Mb
1 kb - 10 kb
613,632
1.3 Gb
18,984
49.1 Mb
10 kb - 100 kb
1,833
25.3 Mb
2,108
55.0 Mb
100 kb - 1 Mb
7
877.2 kb
247
63.1 Mb
1 Mb - 10 Mb
55
196.2 Mb
10 Mb - 100 Mb
48
1.5 Gb