SPO11/YHL022C Additional Physico-chemical Properties Help

Physico-chemical properties were determined using the ProtParam tool available through ExPASy to analyze the primary protein sequence for atomic composition, extinction coefficient, estimated half-life, instability index and aliphatic index. Transcript translation calculations were determined using CodonW.


A.A. Composition
Ala[A] 22 5.5%
Arg[R] 15 3.8%
Asn[N] 31 7.8%
Asp[D] 17 4.3%
Cys[C] 10 2.5%
Gln[Q] 20 5.0%
Glu[E] 17 4.3%
Gly[G] 13 3.3%
His[H] 11 2.8%
Ile[I] 34 8.5%
Leu[L] 44 11.1%
Lys[K] 36 9.0%
Met[M] 7 1.8%
Phe[F] 20 5.0%
Pro[P] 18 4.5%
Ser[S] 26 6.5%
Thr[T] 24 6.0%
Trp[W] 2 0.5%
Tyr[Y] 12 3.0%
Val[V] 19 4.8%
Total Length 398

Instability index
Instability index (II) 31.22
This classifies the protein as stable

Atomic composition
Carbon 2043
Hydrogen 3264
Nitrogen 554
Oxygen 580
Sulfur 17
Total number of atoms 6458
Formula = C2043H3264N554O580S17

Estimated half-life
Escherichia coli (in vivo) >10 hours
mammalian reticulocytes (in vitro) 30 hours
yeast (in vivo) >20 hours

Extinction Coefficients at 280 nm
assuming ALL Cys residues appear as half cystines 29505 M-1 cm-1
assuming NO Cys residues appear as half cystines 28880 M-1 cm-1
assuming all Cys residues are reduced 28880 M-1 cm-1
assuming all pairs of Cys residues form cystines 29505 M-1 cm-1

Aliphatic index
Aliphatic index 95.80

Coding Region Translation Calculations
Codon Bias 0.120
Codon Adaptation Index 0.162
Frequency of Optimal Codons 0.488
Hydropathicity of Protein -0.240
Aromaticity Score 0.085