Human vs Mainland tiger snake LastZ results

Human (Homo sapiens, GRCh38) and Mainland tiger snake (Notechis scutatus, TS10Xv2-PRI) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 96. 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

ParameterHumanMainland tiger snake
Chunk size30,000,00010,100,000
Overlap0100,000
Group set size010,100,000
Masking options{default_soft_masking => 1}{default_soft_masking => 1}

Statistics over 256,065 alignment blocks

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

Uncovered: 3,029,791,179 out of 3,096,649,726
Covered: 66,858,547 out of 3,096,649,726

Uncovered: 9,457,885 out of 35,604,148
Matches: 18,730,288 out of 35,604,148
Mismatches: 7,035,612 out of 35,604,148
Insertions: 380,363 out of 35,604,148
Identity over aligned base-pairs: 71.6%

Mainland tiger snake

Uncovered: 1,617,531,370 out of 1,665,525,958
Covered: 47,994,588 out of 1,665,525,958

Uncovered: 6,889,012 out of 26,728,429
Matches: 14,440,659 out of 26,728,429
Mismatches: 5,151,322 out of 26,728,429
Insertions: 247,436 out of 26,728,429
Identity over aligned base-pairs: 72.8%

Block size distribution

Size range All 256,065 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
638
3.0 kb
10 bp - 100 bp
38,736
2.9 Mb
14,076
1.0 Mb
100 bp - 1 kb
210,910
51.7 Mb
94,522
30.0 Mb
1 kb - 10 kb
5,685
13.1 Mb
12,288
30.8 Mb
10 kb - 100 kb
95
1.5 Mb
390
6.8 Mb
100 kb - 1 Mb
1
100.2 kb
5
617.4 kb