Human vs Indian cobra LastZ results

Human (Homo sapiens, GRCh38) and Indian cobra (Naja naja, Nana_v5) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 101. 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

ParameterHumanIndian cobra
Chunk size30,000,00010,100,000
Overlap0100,000
Group set size010,100,000
Masking options

Statistics over 281,580 alignment blocks

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

Uncovered: 3,023,567,377 out of 3,096,649,726
Covered: 73,082,349 out of 3,096,649,726

Uncovered: 9,588,242 out of 35,634,800
Matches: 18,598,987 out of 35,634,800
Mismatches: 7,051,404 out of 35,634,800
Insertions: 396,167 out of 35,634,800
Identity over aligned base-pairs: 71.4%

Indian cobra

Uncovered: 1,714,195,325 out of 1,768,535,092
Covered: 54,339,767 out of 1,768,535,092

Uncovered: 5,209,823 out of 27,810,543
Matches: 16,310,664 out of 27,810,543
Mismatches: 5,996,613 out of 27,810,543
Insertions: 293,443 out of 27,810,543
Identity over aligned base-pairs: 72.2%

Block size distribution

Size range All 281,580 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
913
4.3 kb
10 bp - 100 bp
42,551
3.2 Mb
15,441
1.2 Mb
100 bp - 1 kb
231,831
57.7 Mb
106,176
34.6 Mb
1 kb - 10 kb
5,801
9.0 Mb
13,016
27.9 Mb
10 kb - 100 kb
481
13.0 Mb
596
18.1 Mb
100 kb - 1 Mb
3
374.7 kb
10
1.4 Mb