C.savignyi vs Zebrafish LastZ results

C.savignyi (Ciona savignyi, CSAV2.0) and Zebrafish (Danio rerio, GRCz11) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 92. C.savignyi 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)
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

ParameterC.savignyiZebrafish
Chunk size10,000,00010,000,000
Overlap00
Group set size00
Masking options

Statistics over 65,331 alignment blocks

Genome coverage (bp) Coding exon coverage (bp)
C.savignyi

Uncovered: 171,307,240 out of 177,003,750
Covered: 5,696,510 out of 177,003,750

Uncovered: 10,121,028 out of 13,817,826
Matches: 2,425,472 out of 13,817,826
Mismatches: 1,223,106 out of 13,817,826
Insertions: 48,220 out of 13,817,826
Identity over aligned base-pairs: 65.6%

Zebrafish

Uncovered: 1,365,154,150 out of 1,373,471,384
Covered: 8,317,234 out of 1,373,471,384

Uncovered: 35,473,000 out of 42,031,845
Matches: 4,342,847 out of 42,031,845
Mismatches: 2,152,361 out of 42,031,845
Insertions: 63,637 out of 42,031,845
Identity over aligned base-pairs: 66.2%

Block size distribution

Size range All 65,331 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
255
1.2 kb
10 bp - 100 bp
19,361
1.5 Mb
7,688
581.7 kb
100 bp - 1 kb
45,498
8.0 Mb
25,108
6.4 Mb
1 kb - 10 kb
217
328.3 kb
1,311
2.4 Mb
10 kb - 100 kb
17
337.7 kb