Physicochemical Properties of Peptide



PPepDB ID:PPepDB_745
Number of amino acids:98
Molecular Weight:10399 Da
Theoretical pI:5.56


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)77.14%
Cysteine CYS (C)66.12%
Glutamic Acid GLU (E)77.14%
Aspartic Acid ASP (D)22.04%
Glycine GLY (G)66.12%
Phynylalanine PHE (F)11.02%
Isoleucine ILE (I)77.14%
Histidine HIS (H)22.04%
Lysine LYS (K)66.12%
Methionine MET (M)11.02%
Leucine LEU (L)1212.24%
Asparagine ASN (N)99.18%
Glutamine GLN (Q)22.04%
Proline PRO (P)33.06%
Serine SER (S)88.16%
Arginine ARG (R)11.02%
Threonine THR (T)99.18%
Tryptophan TRP (W)11.02%
Valine VAL (V)88.16%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC448
HydrogenH745
NitrogenN123
OxygenO145
SulphurS7

FormulaC448H745N123O145S7
Total Number of Atoms:1468


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5875
Absorption 0.1% (=1 g/l)    0.565,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    0.529,   assuming all CYS residues are reduced
Aromaticity:0.020

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.04

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.59, 26.53, 27.55]

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:106.429
Grand average of hydropathicity (GRAVY):0.18