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Human vs Long-tailed chinchilla LastZ results

Human (Homo sapiens, GRCh38) and Long-tailed chinchilla (Chinchilla lanigera, ChiLan1.0) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 90. 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

ParameterHumanLong-tailed chinchilla
Chunk size10,000,00010,100,000
Overlap0100,000
Group set size10,100,000
Masking options{default_soft_masking => 1}{default_soft_masking => 1}

Statistics over 2,122,104 alignment blocks

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

Uncovered: 1,643,141,168 out of 3,099,750,718
Covered: 1,456,609,550 out of 3,099,750,718

Uncovered: 2,493,138 out of 38,571,754
Matches: 30,269,782 out of 38,571,754
Mismatches: 5,234,526 out of 38,571,754
Insertions: 574,308 out of 38,571,754
Identity over aligned base-pairs: 83.9%

Long-tailed chinchilla

Uncovered: 1,051,219,465 out of 2,390,868,971
Covered: 1,339,649,506 out of 2,390,868,971

Uncovered: 865,274 out of 30,052,602
Matches: 25,388,178 out of 30,052,602
Mismatches: 3,692,288 out of 30,052,602
Insertions: 106,862 out of 30,052,602
Identity over aligned base-pairs: 87.0%

Block size distribution

Size range All 2,122,104 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
58,155
389.0 kb
10 bp - 100 bp
248,634
12.3 Mb
16,271
1.1 Mb
100 bp - 1 kb
1,320,486
586.1 Mb
60,568
21.1 Mb
1 kb - 10 kb
494,364
920.8 Mb
17,510
42.9 Mb
10 kb - 100 kb
465
5.9 Mb
1,441
33.9 Mb
100 kb - 1 Mb
183
69.4 Mb
1 Mb - 10 Mb
198
734.4 Mb
10 Mb - 100 Mb
40
622.6 Mb