Human vs Arctic ground squirrel LastZ results

Human (Homo sapiens, GRCh38) and Arctic ground squirrel (Urocitellus parryii, ASM342692v1) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 96. 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

ParameterHumanArctic ground squirrel
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 2,128,310 alignment blocks

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

Uncovered: 1,519,138,032 out of 3,096,649,726
Covered: 1,577,511,694 out of 3,096,649,726

Uncovered: 1,023,900 out of 35,604,148
Matches: 29,683,548 out of 35,604,148
Mismatches: 4,605,958 out of 35,604,148
Insertions: 290,742 out of 35,604,148
Identity over aligned base-pairs: 85.8%

Arctic ground squirrel

Uncovered: 1,072,682,610 out of 2,520,505,282
Covered: 1,447,822,672 out of 2,520,505,282

Uncovered: 1,294,640 out of 31,635,636
Matches: 26,750,747 out of 31,635,636
Mismatches: 3,465,462 out of 31,635,636
Insertions: 124,787 out of 31,635,636
Identity over aligned base-pairs: 88.2%

Block size distribution

Size range All 2,128,310 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
68,913
462.6 kb
10 bp - 100 bp
257,672
12.2 Mb
15,645
1.1 Mb
100 bp - 1 kb
1,264,184
565.9 Mb
60,654
21.9 Mb
1 kb - 10 kb
535,922
1.1 Gb
23,050
62.7 Mb
10 kb - 100 kb
1,612
22.1 Mb
2,795
66.0 Mb
100 kb - 1 Mb
7
767.2 kb
602
237.6 Mb
1 Mb - 10 Mb
437
1.1 Gb
10 Mb - 100 Mb
10
138.9 Mb