Human vs Elephant shark LastZ results

Human (Homo sapiens, GRCh38) and Elephant shark (Callorhinchus milii, Callorhinchus_milii-6.1.3) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 97. 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
Masking count (M)
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

ParameterHumanElephant shark
Chunk size30,000,00010,100,000
Overlap0100,000
Group set size010,100,000
Masking options{default_soft_masking => 1}{default_soft_masking => 1}

Statistics over 194,721 alignment blocks

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

Uncovered: 3,057,372,448 out of 3,096,649,726
Covered: 39,277,278 out of 3,096,649,726

Uncovered: 13,851,041 out of 35,623,403
Matches: 15,114,227 out of 35,623,403
Mismatches: 6,345,251 out of 35,623,403
Insertions: 312,884 out of 35,623,403
Identity over aligned base-pairs: 69.4%

Elephant shark

Uncovered: 945,518,926 out of 974,498,586
Covered: 28,979,660 out of 974,498,586

Uncovered: 12,583,927 out of 30,661,569
Matches: 12,588,178 out of 30,661,569
Mismatches: 5,212,512 out of 30,661,569
Insertions: 276,952 out of 30,661,569
Identity over aligned base-pairs: 69.6%

Block size distribution

Size range All 194,721 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
647
2.7 kb
10 bp - 100 bp
33,128
2.5 Mb
11,712
899.8 kb
100 bp - 1 kb
158,607
33.7 Mb
72,827
21.6 Mb
1 kb - 10 kb
2,315
3.6 Mb
7,701
15.7 Mb
10 kb - 100 kb
24
605.5 kb
126
2.1 Mb
100 kb - 1 Mb
1
125.1 kb