Human vs Microbat LastZ results

Human (Homo sapiens, GRCh38) and Microbat (Myotis lucifugus, Myoluc2.0) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 76. 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
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

ParameterHumanMicrobat
Chunk size30,000,00010,100,000
Overlap0100,000
Group set size10,100,000
Masking options{default_soft_masking => 1}

Statistics over 1,730,604 alignment blocks

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

Uncovered: 1,909,658,643 out of 3,099,750,718
Covered: 1,190,092,075 out of 3,099,750,718

Uncovered: 3,904,428 out of 38,571,754
Matches: 29,360,250 out of 38,571,754
Mismatches: 4,828,909 out of 38,571,754
Insertions: 478,167 out of 38,571,754
Identity over aligned base-pairs: 84.7%

Microbat

Uncovered: 927,295,388 out of 2,034,575,300
Covered: 1,107,279,912 out of 2,034,575,300

Uncovered: 2,975,124 out of 30,512,546
Matches: 24,094,571 out of 30,512,546
Mismatches: 3,310,404 out of 30,512,546
Insertions: 132,447 out of 30,512,546
Identity over aligned base-pairs: 87.5%

Block size distribution

Size range All 1,730,604 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
40,662
264.2 kb
10 bp - 100 bp
173,685
9.7 Mb
17,976
1.2 Mb
100 bp - 1 kb
1,109,850
493.3 Mb
62,256
22.6 Mb
1 kb - 10 kb
406,072
739.7 Mb
18,214
45.5 Mb
10 kb - 100 kb
335
4.1 Mb
2,061
57.8 Mb
100 kb - 1 Mb
698
252.6 Mb
1 Mb - 10 Mb
276
743.3 Mb
10 Mb - 100 Mb
6
124.0 Mb