Chicken vs Indian cobra LastZ results

Chicken (Gallus gallus, bGalGal1.mat.broiler.GRCg7b) and Indian cobra (Naja naja, Nana_v5) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 107. Chicken 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

ParameterChickenIndian cobra
Chunk size10,000,00010,100,000
Overlap0100,000
Group set size10,100,00010,100,000
Masking options

Statistics over 204,757 alignment blocks

Genome coverage (bp) Coding exon coverage (bp)
Chicken

Uncovered: 993,674,807 out of 1,053,332,251
Covered: 59,657,444 out of 1,053,332,251

Uncovered: 7,991,489 out of 31,304,036
Matches: 17,418,109 out of 31,304,036
Mismatches: 5,635,531 out of 31,304,036
Insertions: 258,907 out of 31,304,036
Identity over aligned base-pairs: 74.7%

Indian cobra

Uncovered: 1,710,353,250 out of 1,768,535,092
Covered: 58,181,842 out of 1,768,535,092

Uncovered: 8,015,599 out of 27,810,543
Matches: 14,946,111 out of 27,810,543
Mismatches: 4,645,450 out of 27,810,543
Insertions: 203,383 out of 27,810,543
Identity over aligned base-pairs: 75.5%

Block size distribution

Size range All 204,757 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
451
2.2 kb
10 bp - 100 bp
17,879
1.3 Mb
4,687
350.5 kb
100 bp - 1 kb
180,209
51.2 Mb
50,235
17.1 Mb
1 kb - 10 kb
6,209
9.5 Mb
8,286
21.5 Mb
10 kb - 100 kb
8
251.7 kb
703
16.0 Mb
100 kb - 1 Mb
1
106.8 kb
39
7.4 Mb