Human vs Blue whale LastZ results

Human (Homo sapiens, GRCh38) and Blue whale (Balaenoptera musculus, mBalMus1.v2) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 101. 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

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

Statistics over 2,109,984 alignment blocks

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

Uncovered: 1,477,507,433 out of 3,096,649,726
Covered: 1,619,142,293 out of 3,096,649,726

Uncovered: 828,383 out of 35,634,800
Matches: 30,409,962 out of 35,634,800
Mismatches: 4,118,823 out of 35,634,800
Insertions: 277,632 out of 35,634,800
Identity over aligned base-pairs: 87.4%

Blue whale

Uncovered: 858,504,197 out of 2,379,995,981
Covered: 1,521,491,784 out of 2,379,995,981

Uncovered: 909,296 out of 31,093,315
Matches: 26,755,323 out of 31,093,315
Mismatches: 3,302,765 out of 31,093,315
Insertions: 125,931 out of 31,093,315
Identity over aligned base-pairs: 88.6%

Block size distribution

Size range All 2,109,984 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
68,930
469.2 kb
10 bp - 100 bp
273,516
13.0 Mb
22,936
1.5 Mb
100 bp - 1 kb
1,179,045
534.1 Mb
69,649
25.1 Mb
1 kb - 10 kb
586,903
1.2 Gb
22,015
55.1 Mb
10 kb - 100 kb
1,565
24.1 Mb
2,181
59.7 Mb
100 kb - 1 Mb
25
3.2 Mb
312
77.2 Mb
1 Mb - 10 Mb
67
253.1 Mb
10 Mb - 100 Mb
35
1.2 Gb
100 Mb - 1 Gb
1
105.1 Mb