Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4796
Number of amino acids:114
Molecular Weight:11414.61 Da
Theoretical pI:8.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1412.28%
Cysteine CYS (C)108.77%
Glutamic Acid GLU (E)21.75%
Aspartic Acid ASP (D)32.63%
Glycine GLY (G)1513.16%
Phynylalanine PHE (F)10.88%
Isoleucine ILE (I)54.39%
Histidine HIS (H)10.88%
Lysine LYS (K)97.89%
Methionine MET (M)43.51%
Leucine LEU (L)119.65%
Asparagine ASN (N)21.75%
Glutamine GLN (Q)43.51%
Proline PRO (P)76.14%
Serine SER (S)97.89%
Arginine ARG (R)21.75%
Threonine THR (T)32.63%
Tryptophan TRP (W)00%
Valine VAL (V)108.77%
Tyrosine TYR (Y)21.75%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC491
HydrogenH823
NitrogenN137
OxygenO145
SulphurS14

FormulaC491H823N137O145S14
Total Number of Atoms:1610


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):5
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    3605
Absorption 0.1% (=1 g/l)    0.316,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.261,   assuming all CYS residues are reduced
Aromaticity:0.026

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 49.27

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.44, 28.95, 27.19]

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:92.4561
Grand average of hydropathicity (GRAVY):0.46