SPT14/YPL175W 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] 21 4.6%
Arg[R] 21 4.6%
Asn[N] 19 4.2%
Asp[D] 26 5.8%
Cys[C] 7 1.5%
Gln[Q] 13 2.9%
Glu[E] 23 5.1%
Gly[G] 23 5.1%
His[H] 17 3.8%
Ile[I] 39 8.6%
Leu[L] 41 9.1%
Lys[K] 26 5.8%
Met[M] 11 2.4%
Phe[F] 23 5.1%
Pro[P] 17 3.8%
Ser[S] 32 7.1%
Thr[T] 33 7.3%
Trp[W] 6 1.3%
Tyr[Y] 13 2.9%
Val[V] 41 9.1%
Total Length 452

Instability index
Instability index (II) 37.93
This classifies the protein as stable

Atomic composition
Carbon 2317
Hydrogen 3645
Nitrogen 613
Oxygen 661
Sulfur 18
Total number of atoms 7254
Formula = C2317H3645N613O661S18

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 52745 M-1 cm-1
assuming NO Cys residues appear as half cystines 52370 M-1 cm-1
assuming all Cys residues are reduced 52370 M-1 cm-1
assuming all pairs of Cys residues form cystines 52745 M-1 cm-1

Aliphatic index
Aliphatic index 99.98

Coding Region Translation Calculations
Codon Bias 0.013
Codon Adaptation Index 0.121
Frequency of Optimal Codons 0.428
Hydropathicity of Protein 0.006
Aromaticity Score 0.093