Human vs African ostrich LastZ results

Human (Homo sapiens, GRCh38) and African ostrich (Struthio camelus australis, ASM69896v1) 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
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

ParameterHumanAfrican ostrich
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 298,697 alignment blocks

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

Uncovered: 3,006,842,168 out of 3,096,649,726
Covered: 89,807,558 out of 3,096,649,726

Uncovered: 9,992,670 out of 35,602,741
Matches: 18,573,162 out of 35,602,741
Mismatches: 6,766,432 out of 35,602,741
Insertions: 270,477 out of 35,602,741
Identity over aligned base-pairs: 72.5%

African ostrich

Uncovered: 1,151,702,519 out of 1,225,041,896
Covered: 73,339,377 out of 1,225,041,896

Uncovered: 4,332,881 out of 24,733,708
Matches: 15,222,549 out of 24,733,708
Mismatches: 4,953,217 out of 24,733,708
Insertions: 225,061 out of 24,733,708
Identity over aligned base-pairs: 74.6%

Block size distribution

Size range All 298,697 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
603
3.1 kb
10 bp - 100 bp
36,884
2.8 Mb
10,824
813.8 kb
100 bp - 1 kb
249,461
71.2 Mb
95,381
33.5 Mb
1 kb - 10 kb
11,722
19.3 Mb
16,269
38.0 Mb
10 kb - 100 kb
26
467.7 kb
726
15.6 Mb
100 kb - 1 Mb
1
100.2 kb
34
5.8 Mb