Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3558
Number of amino acids:35
Molecular Weight:3566.98 Da
Theoretical pI:5.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)25.71%
Cysteine CYS (C)822.86%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)25.71%
Glycine GLY (G)720%
Phynylalanine PHE (F)12.86%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)12.86%
Asparagine ASN (N)25.71%
Glutamine GLN (Q)25.71%
Proline PRO (P)25.71%
Serine SER (S)25.71%
Arginine ARG (R)25.71%
Threonine THR (T)12.86%
Tryptophan TRP (W)00%
Valine VAL (V)12.86%
Tyrosine TYR (Y)25.71%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC140
HydrogenH213
NitrogenN45
OxygenO49
SulphurS8

FormulaC140H213N45O49S8
Total Number of Atoms:455


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):2
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    3480
Absorption 0.1% (=1 g/l)    0.976,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.835,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 18.44

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.29, 37.14, 8.57]

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:25.1428
Grand average of hydropathicity (GRAVY):-0.19