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
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 size10,100,000
Masking options

Statistics over 1,546,897 alignment blocks

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

Uncovered: 2,090,981,089 out of 3,099,750,718
Covered: 1,008,769,629 out of 3,099,750,718

Uncovered: 2,458,499 out of 38,571,754
Matches: 29,488,539 out of 38,571,754
Mismatches: 6,013,213 out of 38,571,754
Insertions: 611,503 out of 38,571,754
Identity over aligned base-pairs: 81.7%

Mouse

Uncovered: 1,809,493,182 out of 2,728,222,451
Covered: 918,729,269 out of 2,728,222,451

Uncovered: 4,911,731 out of 39,092,596
Matches: 28,371,881 out of 39,092,596
Mismatches: 5,543,042 out of 39,092,596
Insertions: 265,942 out of 39,092,596
Identity over aligned base-pairs: 83.0%

Block size distribution

Size range All 1,546,897 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
21,624
146.6 kb
10 bp - 100 bp
148,536
8.0 Mb
11,807
799.6 kb
100 bp - 1 kb
1,028,019
476.5 Mb
44,474
16.3 Mb
1 kb - 10 kb
348,444
598.5 Mb
15,186
36.4 Mb
10 kb - 100 kb
271
4.9 Mb
1,130
29.6 Mb
100 kb - 1 Mb
3
355.7 kb
225
71.5 Mb
1 Mb - 10 Mb
133
461.4 Mb
10 Mb - 100 Mb
27
472.3 Mb