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Human vs Eastern brown snake LastZ results

Human (Homo sapiens, GRCh38) and Eastern brown snake (Pseudonaja textilis, EBS10Xv2-PRI) 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

ParameterHumanEastern brown snake
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 254,226 alignment blocks

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

Uncovered: 3,035,658,306 out of 3,099,750,718
Covered: 64,092,412 out of 3,099,750,718

Uncovered: 11,960,595 out of 38,571,754
Matches: 19,094,630 out of 38,571,754
Mismatches: 7,115,146 out of 38,571,754
Insertions: 401,383 out of 38,571,754
Identity over aligned base-pairs: 71.8%

Eastern brown snake

Uncovered: 1,542,077,014 out of 1,590,035,073
Covered: 47,958,059 out of 1,590,035,073

Uncovered: 6,799,622 out of 28,191,271
Matches: 15,546,856 out of 28,191,271
Mismatches: 5,571,897 out of 28,191,271
Insertions: 272,896 out of 28,191,271
Identity over aligned base-pairs: 72.7%

Block size distribution

Size range All 254,226 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
567
2.6 kb
10 bp - 100 bp
37,535
2.8 Mb
12,327
928.2 kb
100 bp - 1 kb
210,515
51.7 Mb
90,474
29.1 Mb
1 kb - 10 kb
5,483
9.5 Mb
12,150
27.5 Mb
10 kb - 100 kb
125
2.4 Mb
451
8.4 Mb
100 kb - 1 Mb
1
100.2 kb
5
626.0 kb