COX2/Q0250 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] 15 6.0%
Arg[R] 5 2.0%
Asn[N] 8 3.2%
Asp[D] 14 5.6%
Cys[C] 4 1.6%
Gln[Q] 9 3.6%
Glu[E] 16 6.4%
Gly[G] 12 4.8%
His[H] 5 2.0%
Ile[I] 26 10.4%
Leu[L] 29 11.6%
Lys[K] 8 3.2%
Met[M] 8 3.2%
Phe[F] 12 4.8%
Pro[P] 13 5.2%
Ser[S] 13 5.2%
Thr[T] 16 6.4%
Trp[W] 5 2.0%
Tyr[Y] 14 5.6%
Val[V] 19 7.6%
Total Length 251

Instability index
Instability index (II) 37.19
This classifies the protein as stable

Atomic composition
Carbon 1324
Hydrogen 2026
Nitrogen 306
Oxygen 372
Sulfur 12
Total number of atoms 4040
Formula = C1324H2026N306O372S12

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 48610 M-1 cm-1
assuming NO Cys residues appear as half cystines 48360 M-1 cm-1
assuming all Cys residues are reduced 48360 M-1 cm-1
assuming all pairs of Cys residues form cystines 48610 M-1 cm-1

Aliphatic index
Aliphatic index 113.39

Coding Region Translation Calculations
Codon Bias -0.042
Codon Adaptation Index 0.194
Frequency of Optimal Codons 0.458
Hydropathicity of Protein 0.353
Aromaticity Score 0.124