Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3562
Number of amino acids:44
Molecular Weight:4543.95 Da
Theoretical pI:8.53


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)49.09%
Cysteine CYS (C)818.18%
Glutamic Acid GLU (E)12.27%
Aspartic Acid ASP (D)00%
Glycine GLY (G)818.18%
Phynylalanine PHE (F)12.27%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)12.27%
Asparagine ASN (N)511.36%
Glutamine GLN (Q)49.09%
Proline PRO (P)00%
Serine SER (S)511.36%
Arginine ARG (R)49.09%
Threonine THR (T)12.27%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)24.55%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC173
HydrogenH273
NitrogenN65
OxygenO64
SulphurS8

FormulaC173H273N65O64S8
Total Number of Atoms:583


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    3480
Absorption 0.1% (=1 g/l)    0.766,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.656,   assuming all CYS residues are reduced
Aromaticity:0.068

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.70

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[9.09, 40.91, 13.64]

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:17.9546
Grand average of hydropathicity (GRAVY):-0.68