SQT1/YIR012W 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] 24 5.6%
Arg[R] 5 1.2%
Asn[N] 22 5.1%
Asp[D] 27 6.3%
Cys[C] 11 2.6%
Gln[Q] 20 4.6%
Glu[E] 38 8.8%
Gly[G] 37 8.6%
His[H] 12 2.8%
Ile[I] 23 5.3%
Leu[L] 38 8.8%
Lys[K] 18 4.2%
Met[M] 12 2.8%
Phe[F] 20 4.6%
Pro[P] 13 3.0%
Ser[S] 32 7.4%
Thr[T] 30 7.0%
Trp[W] 8 1.9%
Tyr[Y] 5 1.2%
Val[V] 36 8.4%
Total Length 431

Instability index
Instability index (II) 36.96
This classifies the protein as stable

Atomic composition
Carbon 2075
Hydrogen 3210
Nitrogen 538
Oxygen 671
Sulfur 23
Total number of atoms 6517
Formula = C2075H3210N538O671S23

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 52075 M-1 cm-1
assuming NO Cys residues appear as half cystines 51450 M-1 cm-1
assuming all Cys residues are reduced 51450 M-1 cm-1
assuming all pairs of Cys residues form cystines 52075 M-1 cm-1

Aliphatic index
Aliphatic index 84.99

Coding Region Translation Calculations
Codon Bias 0.133
Codon Adaptation Index 0.157
Frequency of Optimal Codons 0.494
Hydropathicity of Protein -0.123
Aromaticity Score 0.077