Human vs Nile tilapia LastZ results

Human (Homo sapiens, GRCh38) and Nile tilapia (Oreochromis niloticus, O_niloticus_UMD_NMBU) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 99. 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

ParameterHumanNile tilapia
Chunk size30,000,00010,100,000
Overlap0100,000
Group set size010,100,000
Masking options

Statistics over 255,508 alignment blocks

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

Uncovered: 3,062,937,241 out of 3,096,649,726
Covered: 33,712,485 out of 3,096,649,726

Uncovered: 14,860,988 out of 35,619,351
Matches: 14,242,936 out of 35,619,351
Mismatches: 6,163,392 out of 35,619,351
Insertions: 352,035 out of 35,619,351
Identity over aligned base-pairs: 68.6%

Nile tilapia

Uncovered: 971,755,179 out of 1,005,681,550
Covered: 33,926,371 out of 1,005,681,550

Uncovered: 26,760,584 out of 51,713,280
Matches: 17,109,951 out of 51,713,280
Mismatches: 7,364,374 out of 51,713,280
Insertions: 478,371 out of 51,713,280
Identity over aligned base-pairs: 68.6%

Block size distribution

Size range All 255,508 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
1,654
7.2 kb
10 bp - 100 bp
52,368
3.9 Mb
15,979
1.2 Mb
100 bp - 1 kb
199,821
39.6 Mb
82,411
24.8 Mb
1 kb - 10 kb
1,660
2.5 Mb
9,629
18.9 Mb
10 kb - 100 kb
5
131.0 kb
73
1.2 Mb
100 kb - 1 Mb
1
106.1 kb