Human vs Sperm whale LastZ results

Human (Homo sapiens, GRCh38) and Sperm whale (Physeter catodon, ASM283717v2) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 99. 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

ParameterHumanSperm whale
Chunk size30,000,00010,100,000
Overlap0100,000
Group set size10,100,000
Masking options{default_soft_masking => 1}{default_soft_masking => 1}

Statistics over 2,064,139 alignment blocks

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

Uncovered: 1,513,906,159 out of 3,099,750,718
Covered: 1,585,844,559 out of 3,099,750,718

Uncovered: 1,893,151 out of 38,571,754
Matches: 31,655,659 out of 38,571,754
Mismatches: 4,602,955 out of 38,571,754
Insertions: 419,989 out of 38,571,754
Identity over aligned base-pairs: 86.3%

Sperm whale

Uncovered: 1,020,952,419 out of 2,512,132,974
Covered: 1,491,180,555 out of 2,512,132,974

Uncovered: 1,237,208 out of 30,899,790
Matches: 26,360,843 out of 30,899,790
Mismatches: 3,176,075 out of 30,899,790
Insertions: 125,664 out of 30,899,790
Identity over aligned base-pairs: 88.9%

Block size distribution

Size range All 2,064,139 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
70,157
473.2 kb
10 bp - 100 bp
249,639
11.7 Mb
19,471
1.3 Mb
100 bp - 1 kb
1,171,009
535.6 Mb
61,004
22.0 Mb
1 kb - 10 kb
572,368
1.1 Gb
20,354
51.4 Mb
10 kb - 100 kb
956
13.4 Mb
4,014
122.3 Mb
100 kb - 1 Mb
10
1.2 Mb
438
97.8 Mb
1 Mb - 10 Mb
74
273.5 Mb
10 Mb - 100 Mb
37
1.1 Gb