Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2575
Number of amino acids:35
Molecular Weight:3593.25 Da
Theoretical pI:7.79


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)25.71%
Cysteine CYS (C)617.14%
Glutamic Acid GLU (E)12.86%
Aspartic Acid ASP (D)00%
Glycine GLY (G)411.43%
Phynylalanine PHE (F)25.71%
Isoleucine ILE (I)38.57%
Histidine HIS (H)12.86%
Lysine LYS (K)12.86%
Methionine MET (M)00%
Leucine LEU (L)12.86%
Asparagine ASN (N)00%
Glutamine GLN (Q)25.71%
Proline PRO (P)514.29%
Serine SER (S)411.43%
Arginine ARG (R)12.86%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)25.71%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC154
HydrogenH243
NitrogenN43
OxygenO44
SulphurS6

FormulaC154H243N43O44S6
Total Number of Atoms:490


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    375
Absorption 0.1% (=1 g/l)    0.104,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.057

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 60.67

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.86, 37.14, 11.43]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:66.8572
Grand average of hydropathicity (GRAVY):0.43