Opossum vs Wallaby LastZ results

Opossum (Monodelphis domestica, ASM229v1) and Wallaby (Notamacropus eugenii, Meug_1.0) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 98. Opossum 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

ParameterOpossumWallaby
Chunk size10,000,00010,100,000
Overlap0100,000
Group set size010,100,000
Masking options{default_soft_masking => 1}{default_soft_masking => 1}

Statistics over 2,211,463 alignment blocks

Genome coverage (bp) Coding exon coverage (bp)
Opossum

Uncovered: 2,070,730,612 out of 3,600,504,728
Covered: 1,529,774,116 out of 3,600,504,728

Uncovered: 5,336,098 out of 35,083,223
Matches: 23,782,940 out of 35,083,223
Mismatches: 5,733,290 out of 35,083,223
Insertions: 230,895 out of 35,083,223
Identity over aligned base-pairs: 80.0%

Wallaby

Uncovered: 1,497,950,787 out of 2,955,773,937
Covered: 1,457,823,150 out of 2,955,773,937

Uncovered: 2,913,772 out of 25,589,509
Matches: 18,057,594 out of 25,589,509
Mismatches: 4,543,520 out of 25,589,509
Insertions: 74,623 out of 25,589,509
Identity over aligned base-pairs: 79.6%

Block size distribution

Size range All 2,211,463 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
54,585
355.4 kb
10 bp - 100 bp
219,307
11.8 Mb
39,909
2.9 Mb
100 bp - 1 kb
1,401,168
635.3 Mb
287,447
133.6 Mb
1 kb - 10 kb
536,234
962.9 Mb
183,177
557.8 Mb
10 kb - 100 kb
168
2.7 Mb
39,092
840.8 Mb
100 kb - 1 Mb
1
114.7 kb
555
78.1 Mb