Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3102
Number of amino acids:36
Molecular Weight:3872.38 Da
Theoretical pI:8.66


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)616.67%
Glutamic Acid GLU (E)12.78%
Aspartic Acid ASP (D)00%
Glycine GLY (G)822.22%
Phynylalanine PHE (F)12.78%
Isoleucine ILE (I)12.78%
Histidine HIS (H)00%
Lysine LYS (K)12.78%
Methionine MET (M)00%
Leucine LEU (L)12.78%
Asparagine ASN (N)411.11%
Glutamine GLN (Q)25.56%
Proline PRO (P)38.33%
Serine SER (S)12.78%
Arginine ARG (R)38.33%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)12.78%
Tyrosine TYR (Y)38.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC160
HydrogenH244
NitrogenN52
OxygenO49
SulphurS6

FormulaC160H244N52O49S6
Total Number of Atoms:511


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    4845
Absorption 0.1% (=1 g/l)    1.251,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    1.154,   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 : 23.93

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[19.44, 44.44, 5.56]

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:29.7222
Grand average of hydropathicity (GRAVY):-0.68