Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1994
Number of amino acids:29
Molecular Weight:3011.48 Da
Theoretical pI:5.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)620.69%
Glutamic Acid GLU (E)13.45%
Aspartic Acid ASP (D)00%
Glycine GLY (G)413.79%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)13.45%
Methionine MET (M)00%
Leucine LEU (L)310.34%
Asparagine ASN (N)13.45%
Glutamine GLN (Q)00%
Proline PRO (P)310.34%
Serine SER (S)13.45%
Arginine ARG (R)00%
Threonine THR (T)724.14%
Tryptophan TRP (W)13.45%
Valine VAL (V)00%
Tyrosine TYR (Y)13.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC125
HydrogenH196
NitrogenN32
OxygenO42
SulphurS6

FormulaC125H196N32O42S6
Total Number of Atoms:401


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

Ext. coefficient    7365
Absorption 0.1% (=1 g/l)    2.446,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    2.321,   assuming all CYS residues are reduced
Aromaticity:0.069

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.57

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[17.24, 31.03, 13.79]

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:40.3447
Grand average of hydropathicity (GRAVY):0.04