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
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 size10,100,000
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: 1,740,665,496 out of 3,099,750,718
Covered: 1,359,085,222 out of 3,099,750,718

Uncovered: 2,558,905 out of 38,571,754
Matches: 29,887,862 out of 38,571,754
Mismatches: 5,494,763 out of 38,571,754
Insertions: 630,224 out of 38,571,754
Identity over aligned base-pairs: 83.0%

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: 1,394,908 out of 29,816,153
Matches: 24,538,741 out of 29,816,153
Mismatches: 3,773,287 out of 29,816,153
Insertions: 109,217 out of 29,816,153
Identity over aligned base-pairs: 86.3%

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