Human vs Chicken LastZ results

Human (Homo sapiens, GRCh38) and Chicken (Gallus gallus, bGalGal1.mat.broiler.GRCg7b) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 109. 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

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

Statistics over 290,722 alignment blocks

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

Uncovered: 3,018,945,955 out of 3,096,649,726
Covered: 77,703,771 out of 3,096,649,726

Uncovered: 10,270,528 out of 35,843,233
Matches: 18,901,161 out of 35,843,233
Mismatches: 6,296,941 out of 35,843,233
Insertions: 374,603 out of 35,843,233
Identity over aligned base-pairs: 73.9%

Chicken

Uncovered: 989,090,064 out of 1,053,332,251
Covered: 64,242,187 out of 1,053,332,251

Uncovered: 8,561,399 out of 31,304,036
Matches: 16,935,596 out of 31,304,036
Mismatches: 5,517,790 out of 31,304,036
Insertions: 289,251 out of 31,304,036
Identity over aligned base-pairs: 74.5%

Block size distribution

Size range All 290,722 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
854
4.6 kb
10 bp - 100 bp
36,555
2.7 Mb
9,262
697.4 kb
100 bp - 1 kb
243,679
67.9 Mb
85,323
29.7 Mb
1 kb - 10 kb
9,625
14.8 Mb
14,759
34.6 Mb
10 kb - 100 kb
8
112.6 kb
707
15.7 Mb
100 kb - 1 Mb
1
100.2 kb
29
4.9 Mb