MED8/YBR193C 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] 8 3.6%
Arg[R] 11 4.9%
Asn[N] 9 4.0%
Asp[D] 12 5.4%
Cys[C] 0 0.0%
Gln[Q] 13 5.8%
Glu[E] 19 8.5%
Gly[G] 8 3.6%
His[H] 5 2.2%
Ile[I] 6 2.7%
Leu[L] 25 11.2%
Lys[K] 13 5.8%
Met[M] 4 1.8%
Phe[F] 9 4.0%
Pro[P] 10 4.5%
Ser[S] 25 11.2%
Thr[T] 23 10.3%
Trp[W] 3 1.3%
Tyr[Y] 4 1.8%
Val[V] 16 7.2%
Total Length 223

Instability index
Instability index (II) 48.84
This classifies the protein as unstable

Atomic composition
Carbon 1111
Hydrogen 1764
Nitrogen 304
Oxygen 360
Sulfur 4
Total number of atoms 3543
Formula = C1111H1764N304O360S4

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 22460 M-1 cm-1

Aliphatic index
Aliphatic index 78.61

Coding Region Translation Calculations
Codon Bias 0.129
Codon Adaptation Index 0.140
Frequency of Optimal Codons 0.477
Hydropathicity of Protein -0.576
Aromaticity Score 0.072