Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2283
Number of amino acids:36
Molecular Weight:3534.89 Da
Theoretical pI:3.8


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)411.11%
Cysteine CYS (C)822.22%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)12.78%
Glycine GLY (G)822.22%
Phynylalanine PHE (F)12.78%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)12.78%
Asparagine ASN (N)25.56%
Glutamine GLN (Q)38.33%
Proline PRO (P)12.78%
Serine SER (S)25.56%
Arginine ARG (R)00%
Threonine THR (T)25.56%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)38.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC140
HydrogenH205
NitrogenN41
OxygenO51
SulphurS8

FormulaC140H205N41O51S8
Total Number of Atoms:445


Total number of positively charged residues (ARG + LYS):0
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    4970
Absorption 0.1% (=1 g/l)    1.406,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    1.265,   assuming all CYS residues are reduced
Aromaticity:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : -10.61

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[13.89, 36.11, 13.89]

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:21.9444
Grand average of hydropathicity (GRAVY):0.03