Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2414
Number of amino acids:33
Molecular Weight:3246.8 Da
Theoretical pI:8.72


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)13.03%
Cysteine CYS (C)618.18%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)13.03%
Glycine GLY (G)824.24%
Phynylalanine PHE (F)13.03%
Isoleucine ILE (I)26.06%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)13.03%
Leucine LEU (L)00%
Asparagine ASN (N)00%
Glutamine GLN (Q)00%
Proline PRO (P)39.09%
Serine SER (S)412.12%
Arginine ARG (R)412.12%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)26.06%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC128
HydrogenH213
NitrogenN45
OxygenO40
SulphurS7

FormulaC128H213N45O40S7
Total Number of Atoms:433


Total number of positively charged residues (ARG + LYS):4
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)    0.115,   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:0.030

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 69.90

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[15.15, 45.45, 6.06]

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:44.2424
Grand average of hydropathicity (GRAVY):0.19