Human vs Pig LastZ results

Human (Homo sapiens, GRCh38) and Pig (Sus scrofa, Sscrofa11.1) 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)
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

ParameterHumanPig
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 2,280,252 alignment blocks

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

Uncovered: 1,593,323,863 out of 3,096,649,726
Covered: 1,503,325,863 out of 3,096,649,726

Uncovered: 672,910 out of 35,437,039
Matches: 30,092,936 out of 35,437,039
Mismatches: 4,373,211 out of 35,437,039
Insertions: 297,982 out of 35,437,039
Identity over aligned base-pairs: 86.6%

Pig

Uncovered: 1,094,728,205 out of 2,501,912,388
Covered: 1,407,184,183 out of 2,501,912,388

Uncovered: 0 out of 11,341
Matches: 8,280 out of 11,341
Mismatches: 2,995 out of 11,341
Insertions: 66 out of 11,341
Identity over aligned base-pairs: 73.0%

Block size distribution

Size range All 2,280,252 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
86,892
577.8 kb
10 bp - 100 bp
282,057
13.6 Mb
17,030
1.2 Mb
100 bp - 1 kb
1,408,034
626.7 Mb
57,456
20.7 Mb
1 kb - 10 kb
502,541
931.0 Mb
17,517
42.8 Mb
10 kb - 100 kb
728
9.8 Mb
1,454
34.1 Mb
100 kb - 1 Mb
131
39.6 Mb
1 Mb - 10 Mb
73
260.0 Mb
10 Mb - 100 Mb
43
1.2 Gb