Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3560
Number of amino acids:35
Molecular Weight:3672.03 Da
Theoretical pI:4.56


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)822.86%
Glutamic Acid GLU (E)12.86%
Aspartic Acid ASP (D)25.71%
Glycine GLY (G)617.14%
Phynylalanine PHE (F)12.86%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)12.86%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)25.71%
Glutamine GLN (Q)38.57%
Proline PRO (P)25.71%
Serine SER (S)38.57%
Arginine ARG (R)12.86%
Threonine THR (T)25.71%
Tryptophan TRP (W)00%
Valine VAL (V)12.86%
Tyrosine TYR (Y)25.71%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC143
HydrogenH216
NitrogenN44
OxygenO54
SulphurS8

FormulaC143H216N44O54S8
Total Number of Atoms:465


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):3
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)    0.948,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.812,   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 : 28.19

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[11.43, 37.14, 2.86]

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:8.28571
Grand average of hydropathicity (GRAVY):-0.61