Human vs Sheep LastZ results

Human (Homo sapiens, GRCh38) and Sheep (Ovis aries, ARS-UI_Ramb_v2.0) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 111. 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

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

Statistics over 2,247,740 alignment blocks

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

Uncovered: 1,705,936,093 out of 3,099,750,718
Covered: 1,393,814,625 out of 3,099,750,718

Uncovered: 1,039,835 out of 35,869,223
Matches: 29,935,783 out of 35,869,223
Mismatches: 4,572,664 out of 35,869,223
Insertions: 320,941 out of 35,869,223
Identity over aligned base-pairs: 85.9%

Sheep

Uncovered: 1,318,772,476 out of 2,628,146,905
Covered: 1,309,374,429 out of 2,628,146,905

Uncovered: 3,387,841 out of 36,241,706
Matches: 28,382,003 out of 36,241,706
Mismatches: 4,264,214 out of 36,241,706
Insertions: 207,648 out of 36,241,706
Identity over aligned base-pairs: 86.4%

Block size distribution

Size range All 2,247,740 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
80,743
539.7 kb
10 bp - 100 bp
255,134
12.0 Mb
15,221
1.0 Mb
100 bp - 1 kb
1,421,200
646.2 Mb
56,414
20.5 Mb
1 kb - 10 kb
489,947
875.6 Mb
18,975
47.2 Mb
10 kb - 100 kb
705
10.8 Mb
1,961
54.4 Mb
100 kb - 1 Mb
11
1.3 Mb
301
81.1 Mb
1 Mb - 10 Mb
95
340.0 Mb
10 Mb - 100 Mb
48
1.0 Gb