Human vs Eurasian red squirrel LastZ results

Human (Homo sapiens, GRCh38) and Eurasian red squirrel (Sciurus vulgaris, mSciVul1.1) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 101. 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

ParameterHumanEurasian red squirrel
Chunk size30,000,00010,100,000
Overlap0100,000
Group set size010,100,000
Masking options

Statistics over 2,524,705 alignment blocks

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

Uncovered: 1,470,974,135 out of 3,096,649,726
Covered: 1,625,675,591 out of 3,096,649,726

Uncovered: 626,126 out of 35,634,800
Matches: 30,399,941 out of 35,634,800
Mismatches: 4,304,662 out of 35,634,800
Insertions: 304,071 out of 35,634,800
Identity over aligned base-pairs: 86.8%

Eurasian red squirrel

Uncovered: 1,233,043,262 out of 2,878,591,032
Covered: 1,645,547,770 out of 2,878,591,032

Uncovered: 307,890 out of 33,947,064
Matches: 29,611,837 out of 33,947,064
Mismatches: 3,903,574 out of 33,947,064
Insertions: 123,763 out of 33,947,064
Identity over aligned base-pairs: 88.0%

Block size distribution

Size range All 2,524,705 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
74,822
501.5 kb
10 bp - 100 bp
350,578
18.0 Mb
60,310
4.1 Mb
100 bp - 1 kb
1,497,202
649.4 Mb
162,719
55.6 Mb
1 kb - 10 kb
600,986
1.2 Gb
47,454
120.4 Mb
10 kb - 100 kb
1,086
16.3 Mb
3,895
85.7 Mb
100 kb - 1 Mb
31
4.1 Mb
149
39.2 Mb
1 Mb - 10 Mb
49
189.4 Mb
10 Mb - 100 Mb
38
1.4 Gb