Human vs Rabbit LastZ results

Human (Homo sapiens, GRCh38) and Rabbit (Oryctolagus cuniculus, OryCun2.0) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 76. 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

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

Statistics over 2,050,317 alignment blocks

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

Uncovered: 1,773,347,892 out of 3,096,649,726
Covered: 1,323,301,834 out of 3,096,649,726

Uncovered: 2,466,463 out of 35,228,305
Matches: 27,987,820 out of 35,228,305
Mismatches: 4,401,818 out of 35,228,305
Insertions: 372,204 out of 35,228,305
Identity over aligned base-pairs: 85.4%

Rabbit

Uncovered: 1,520,596,662 out of 2,737,490,501
Covered: 1,216,893,839 out of 2,737,490,501

Uncovered: 2,339,628 out of 30,778,396
Matches: 24,805,133 out of 30,778,396
Mismatches: 3,507,162 out of 30,778,396
Insertions: 126,473 out of 30,778,396
Identity over aligned base-pairs: 87.2%

Block size distribution

Size range All 2,050,317 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
29,355
198.5 kb
10 bp - 100 bp
218,457
12.2 Mb
17,115
1.2 Mb
100 bp - 1 kb
1,363,475
600.2 Mb
61,532
22.4 Mb
1 kb - 10 kb
452,274
808.0 Mb
18,970
47.8 Mb
10 kb - 100 kb
364
4.6 Mb
1,994
54.3 Mb
100 kb - 1 Mb
400
117.6 Mb
1 Mb - 10 Mb
95
272.9 Mb
10 Mb - 100 Mb
32
909.1 Mb