Human vs Algerian mouse LastZ results

Human (Homo sapiens, GRCh38) and Algerian mouse (Mus spretus, SPRET_EiJ_v1) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 86. 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

ParameterHumanAlgerian mouse
Chunk size10,000,00010,100,000
Overlap0100,000
Group set size010,100,000
Masking options{default_soft_masking => 1}{default_soft_masking => 1}

Statistics over 1,507,750 alignment blocks

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

Uncovered: 2,097,443,895 out of 3,096,649,726
Covered: 999,205,831 out of 3,096,649,726

Uncovered: 1,308,803 out of 35,387,657
Matches: 28,162,469 out of 35,387,657
Mismatches: 5,508,767 out of 35,387,657
Insertions: 407,618 out of 35,387,657
Identity over aligned base-pairs: 82.6%

Algerian mouse

Uncovered: 1,715,840,300 out of 2,625,571,169
Covered: 909,730,869 out of 2,625,571,169

Uncovered: 1,817,705 out of 33,001,572
Matches: 26,192,127 out of 33,001,572
Mismatches: 4,828,215 out of 33,001,572
Insertions: 163,525 out of 33,001,572
Identity over aligned base-pairs: 84.0%

Block size distribution

Size range All 1,507,750 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
20,877
141.1 kb
10 bp - 100 bp
144,577
7.8 Mb
11,496
782.2 kb
100 bp - 1 kb
1,004,329
465.0 Mb
43,436
16.1 Mb
1 kb - 10 kb
337,809
577.8 Mb
14,978
35.8 Mb
10 kb - 100 kb
158
2.0 Mb
900
20.0 Mb
100 kb - 1 Mb
154
58.7 Mb
1 Mb - 10 Mb
134
465.0 Mb
10 Mb - 100 Mb
26
456.2 Mb