Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5623
Number of amino acids:217
Molecular Weight:22977.63 Da
Theoretical pI:8.89


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2511.52%
Cysteine CYS (C)20.92%
Glutamic Acid GLU (E)62.76%
Aspartic Acid ASP (D)83.69%
Glycine GLY (G)167.37%
Phynylalanine PHE (F)135.99%
Isoleucine ILE (I)115.07%
Histidine HIS (H)31.38%
Lysine LYS (K)146.45%
Methionine MET (M)31.38%
Leucine LEU (L)2210.14%
Asparagine ASN (N)156.91%
Glutamine GLN (Q)94.15%
Proline PRO (P)146.45%
Serine SER (S)73.23%
Arginine ARG (R)31.38%
Threonine THR (T)2210.14%
Tryptophan TRP (W)10.46%
Valine VAL (V)219.68%
Tyrosine TYR (Y)20.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1043
HydrogenH1665
NitrogenN271
OxygenO301
SulphurS5

FormulaC1043H1665N271O301S5
Total Number of Atoms:3285


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8605
Absorption 0.1% (=1 g/l)    0.374,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.369,   assuming all CYS residues are reduced
Aromaticity:0.074

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 21.31

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.26, 23.96, 25.81]

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:98.8938
Grand average of hydropathicity (GRAVY):0.23