Platypus vs Opossum LastZ results

Platypus (Ornithorhynchus anatinus, mOrnAna1.p.v1) and Opossum (Monodelphis domestica, ASM229v1) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 100. Platypus 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

ParameterPlatypusOpossum
Chunk size10,000,00010,100,000
Overlap0100,000
Group set size010,100,000
Masking options

Statistics over 439,532 alignment blocks

Genome coverage (bp) Coding exon coverage (bp)
Platypus

Uncovered: 1,713,277,346 out of 1,858,552,590
Covered: 145,275,244 out of 1,858,552,590

Uncovered: 4,831,526 out of 31,202,085
Matches: 19,907,456 out of 31,202,085
Mismatches: 6,111,166 out of 31,202,085
Insertions: 351,937 out of 31,202,085
Identity over aligned base-pairs: 75.5%

Opossum

Uncovered: 3,446,303,424 out of 3,600,504,728
Covered: 154,201,304 out of 3,600,504,728

Uncovered: 7,781,784 out of 35,083,223
Matches: 20,617,791 out of 35,083,223
Mismatches: 6,315,584 out of 35,083,223
Insertions: 368,064 out of 35,083,223
Identity over aligned base-pairs: 75.5%

Block size distribution

Size range All 439,532 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
1,083
5.5 kb
10 bp - 100 bp
40,913
2.9 Mb
11,647
866.3 kb
100 bp - 1 kb
373,717
127.6 Mb
128,895
48.8 Mb
1 kb - 10 kb
23,789
37.0 Mb
22,995
52.9 Mb
10 kb - 100 kb
30
534.4 kb
1,337
31.8 Mb
100 kb - 1 Mb
122
28.8 Mb
1 Mb - 10 Mb
3
4.8 Mb