Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4744
Number of amino acids:408
Molecular Weight:45376.48 Da
Theoretical pI:6.74


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)368.82%
Cysteine CYS (C)40.98%
Glutamic Acid GLU (E)174.17%
Aspartic Acid ASP (D)266.37%
Glycine GLY (G)327.84%
Phynylalanine PHE (F)235.64%
Isoleucine ILE (I)297.11%
Histidine HIS (H)71.72%
Lysine LYS (K)245.88%
Methionine MET (M)81.96%
Leucine LEU (L)307.35%
Asparagine ASN (N)266.37%
Glutamine GLN (Q)122.94%
Proline PRO (P)143.43%
Serine SER (S)297.11%
Arginine ARG (R)184.41%
Threonine THR (T)235.64%
Tryptophan TRP (W)92.21%
Valine VAL (V)266.37%
Tyrosine TYR (Y)153.68%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2045
HydrogenH3143
NitrogenN547
OxygenO600
SulphurS12

FormulaC2045H3143N547O600S12
Total Number of Atoms:6347


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):43
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    72100
Absorption 0.1% (=1 g/l)    1.589,   assuming all pairs of CYS residues form cystines

Ext. coefficient    71850
Absorption 0.1% (=1 g/l)    1.583,   assuming all CYS residues are reduced
Aromaticity:0.115

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.67

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.35, 24.75, 22.30]

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:83.701
Grand average of hydropathicity (GRAVY):-0.18