SPT8/YLR055C 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] 35 5.8%
Arg[R] 21 3.5%
Asn[N] 37 6.1%
Asp[D] 68 11.3%
Cys[C] 6 1.0%
Gln[Q] 22 3.7%
Glu[E] 55 9.1%
Gly[G] 52 8.6%
His[H] 15 2.5%
Ile[I] 32 5.3%
Leu[L] 49 8.1%
Lys[K] 29 4.8%
Met[M] 13 2.2%
Phe[F] 10 1.7%
Pro[P] 19 3.2%
Ser[S] 58 9.6%
Thr[T] 23 3.8%
Trp[W] 7 1.2%
Tyr[Y] 18 3.0%
Val[V] 33 5.5%
Total Length 602

Instability index
Instability index (II) 46.24
This classifies the protein as unstable

Atomic composition
Carbon 2828
Hydrogen 4402
Nitrogen 790
Oxygen 1007
Sulfur 19
Total number of atoms 9046
Formula = C2828H4402N790O1007S19

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 65695 M-1 cm-1
assuming NO Cys residues appear as half cystines 65320 M-1 cm-1
assuming all Cys residues are reduced 65320 M-1 cm-1
assuming all pairs of Cys residues form cystines 65695 M-1 cm-1

Aliphatic index
Aliphatic index 74.19

Coding Region Translation Calculations
Codon Bias 0.061
Codon Adaptation Index 0.124
Frequency of Optimal Codons 0.443
Hydropathicity of Protein -0.725
Aromaticity Score 0.058