Human vs Mouse LastZ results

Human (Homo sapiens, GRCh38) and Mouse (Mus musculus, GRCm39) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 103. 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

ParameterHumanMouse
Chunk size30,000,00010,100,000
Overlap0100,000
Group set size010,100,000
Masking options

Statistics over 1,580,711 alignment blocks

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

Uncovered: 2,087,880,097 out of 3,096,649,726
Covered: 1,008,769,629 out of 3,096,649,726

Uncovered: 1,252,902 out of 35,671,920
Matches: 28,414,985 out of 35,671,920
Mismatches: 5,586,657 out of 35,671,920
Insertions: 417,376 out of 35,671,920
Identity over aligned base-pairs: 82.6%

Mouse

Uncovered: 1,808,635,860 out of 2,728,222,451
Covered: 919,586,591 out of 2,728,222,451

Uncovered: 3,877,352 out of 36,555,494
Matches: 27,292,402 out of 36,555,494
Mismatches: 5,195,149 out of 36,555,494
Insertions: 190,591 out of 36,555,494
Identity over aligned base-pairs: 83.5%

Block size distribution

Size range All 1,580,711 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
22,051
149.2 kb
10 bp - 100 bp
152,206
8.2 Mb
12,570
851.3 kb
100 bp - 1 kb
1,051,183
486.7 Mb
48,279
17.7 Mb
1 kb - 10 kb
354,977
609.9 Mb
16,604
40.6 Mb
10 kb - 100 kb
283
5.5 Mb
1,314
35.3 Mb
100 kb - 1 Mb
11
1.4 Mb
252
82.5 Mb
1 Mb - 10 Mb
134
462.5 Mb
10 Mb - 100 Mb
27
472.3 Mb