Human vs Guinea Pig LastZ results

Human (Homo sapiens, GRCh38) and Guinea Pig (Cavia porcellus, Cavpor3.0) 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
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

ParameterHumanGuinea Pig
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 1,928,699 alignment blocks

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

Uncovered: 1,737,564,504 out of 3,096,649,726
Covered: 1,359,085,222 out of 3,096,649,726

Uncovered: 1,455,507 out of 35,387,657
Matches: 28,508,887 out of 35,387,657
Mismatches: 5,007,944 out of 35,387,657
Insertions: 415,319 out of 35,387,657
Identity over aligned base-pairs: 84.0%

Guinea Pig

Uncovered: 1,482,900,515 out of 2,723,219,641
Covered: 1,240,319,126 out of 2,723,219,641

Uncovered: 0 out of 11,348
Matches: 7,913 out of 11,348
Mismatches: 3,396 out of 11,348
Insertions: 39 out of 11,348
Identity over aligned base-pairs: 69.7%

Block size distribution

Size range All 1,928,699 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
47,102
315.8 kb
10 bp - 100 bp
219,907
10.9 Mb
13,859
950.4 kb
100 bp - 1 kb
1,194,277
536.9 Mb
52,142
18.6 Mb
1 kb - 10 kb
466,988
870.3 Mb
15,610
38.9 Mb
10 kb - 100 kb
425
5.3 Mb
1,417
34.8 Mb
100 kb - 1 Mb
278
110.2 Mb
1 Mb - 10 Mb
206
686.0 Mb
10 Mb - 100 Mb
33
534.3 Mb